Contributors:
bboyho,
Elias The Sparkiest Introduction Note:This tutorial is for the MicroMod Main Board - Single V1.1 and Double V1.1. For users with the newer versions of the Main Boards, make sure to check out the
updated tutorial.
The MicroMod Main Board - Single and Double are specialized carrier boards that allow you to interface a Processor Board with a Function Board(s). The modular system allows you to add an additional feature(s) to a Processor Board with the help of a Function Board(s).
Required MaterialsTo follow along with this tutorial, you will need the following materials at a minimum. You may not need everything though depending on what you have. Add it to your cart, read through the guide, and adjust the cart as necessary.
Reversible USB A to C Cable - 2m CAB-15424These 2m cables have minor modifications that allow them to be be plugged into their ports regardless of orientation on the U…
microSD Card - 1GB (Class 4) COM-15107For the times when all you need is a basic SD card this is the card for you. 1GB capacity is plenty to store MP3s or log envi…
Pocket Screwdriver Set TOL-12891What should every hacker have available to them? That's right, a screwdriver (you have to get into those cases somehow). What…
MicroMod Main BoardTo hold the processor and function boards, you will need one Main board. Depending on your application, you may choose to have either one or two function boards.
MicroMod Processor BoardThere are a variety of MicroMod Processor Boards available to choose from. You will probably want to avoid having the same Processor and Function Board since there is an ESP32 on both types of boards.
SparkFun MicroMod Teensy Processor DEV-16402This board leverages the awesome computing power of the NXP iMXRT1062 chip (ARM Cortex-M7) and pairs it with the M.2 MicroMod…
SparkFun MicroMod RP2040 Processor DEV-17720The SparkFun MicroMod Pi RP2040 Processor Board is a low-cost, high-performance board with flexible digital interfaces featur…
MicroMod Function BoardTo add additional functionality to your Processor Board, you'll want to include one or two function boards when connecting them to the Main Board. Make sure to check out the catalog for other function boards.
ToolsYou will need a screw driver to secure the Processor and Function boards. To set the charge rate, you will need a precision screw driver (or a tiny, rounded object). The pocket screwdriver set is an excellent option. For users using a microSD card and want to easily read the contents of the memory card, you will need a microSD card adapter or USB reader.
Pocket Screwdriver Set TOL-12891What should every hacker have available to them? That's right, a screwdriver (you have to get into those cases somehow). What…
SparkFun Mini Screwdriver TOL-09146This is just your basic reversible screwdriver - pocket sized! Both flat and phillips heads available. Comes with pin clip an…
microSD USB Reader COM-13004This is an awesome little microSD USB reader. Just slide your microSD card into the inside of the USB connector, then stick t…
Retired Suggested ReadingIf you aren't familiar with the MicroMod ecosystem, we recommend reading here for an overview. We recommend reading here for an overview if you decide to take advantage of the Qwiic connector.
If you aren’t familiar with the following concepts, we also recommend checking out a few of these tutorials before continuing. Make sure to check the respective hookup guides for your processor board and function board to ensure that you are installing the correct USB-to-serial converter. You may also need to follow additional instructions that are not outlined in this tutorial to install the appropriate software.
What is an Arduino?What is this 'Arduino' thing anyway? This tutorials dives into what an Arduino is and along with Arduino projects and widgets.
Installing Arduino IDEA step-by-step guide to installing and testing the Arduino software on Windows, Mac, and Linux.
Getting Started with MicroModDive into the world of MicroMod - a compact interface to connect a microcontroller to various peripherals via the M.2 Connector!
Hardware OverviewThe overall functionality of the Single and Double Main Boards are the same. We'll use the Single Main Board more in this section to highlight the features since this is also included in the Double Main Board. We'll switch to the Double Main Board when necessary to highlight the features that are only included in the Double Main Board.
The only differences are that the Double Main Board includes:
There are two ways to power the Main Boards, Processor Board, and Function Board(s).
It is fine to connect a power source to the USB connector and LiPo battery's JST connector at the same time. The MicroMod Main Board has power-control circuitry to automatically select the best power source.
Power USBOne option of powering the board is through the USB Type C connector. You will need a USB Type C cable to power the board with 5V. Power connected to the board's USB C connector will go through a resettable PTC fuse (rated at 2A max) and then the AP7361C 3.3V voltage regulator (rated at 1A max). The little green component close to the USB connector is the resettable PTC fuse while the square IC is the voltage regulator. The voltage regulator accepts voltages between ~3.3V to 6.0V.
The USB Type C connector is also used to upload code to your Processor Board, send serial data to a terminal window, or charge the LiPo battery. Of course for portable power, you could connect a USB battery as an alternative to using a LiPo battery.
Power applied to the connector will light up the VIN and 3V3 LED. If you decide to bypass the PTC fuse, simply add a solder blob to the jumper labeled as PTC. There is also a jumper labeled as MEAS to measure the current consumption at the output of the 3.3V voltage regulator for your project.
Power LiPoThe other option is to connect a single cell LiPo battery (i.e. nominal 3.7V, 4.2V fully charged) to the 2-pin JST connector as shown below. A MCP73831 charge IC is included on the boards to safely charge the LiPo batteries via USB Type C connector. A switch is included to set the charge rate. The charge rate is probably set to ~166mA with both switches flipped to the ON position. This may vary depending on the position of the switch when it was pulled from the reel. Flip the switch to adjust the charge rate to either 100mA or 500mA using a precision flat head screw driver or tweezers.
The voltage from the LiPo battery is regulated down to 3.3V as it goes through the AP7361C 3.3V voltage regulator (rated at 1A max).
MicroMod Processor BoardThe MicroMod ecosystem allows you to easily swap out processors depending on your application. The location of the M.2 connector labeled as Processor is where you would connect and secure a MicroMod Processor Board.
MicroMod Function BoardBeside the MicroMod Processor's socket is another M.2 connector for MicroMod Function Boards, which allow you to add additional functionality to your Processor Board. The Single Main Board includes one socket for a single Function Board while the Double Main Board includes two sockets for up two Function Boards.
Reset and Boot ButtonsEach board includes a reset and boot button. There is an additional reset button PTH next to the reset button. Hitting the reset button to restart your Processor Board. Hitting the boot button will put the Processor Board into a special boot mode. Depending on the processor board, this boot pin may not be connected.
SWD PinsFor advanced users, we broke out the 2x5 SWD programming pins. Note that this is not populated so you will need a compatible header and compatible JTAG programmer to connect.
MicroSD SocketThe board includes a microSD socket if your application requires you to log and save data to a memory card. The primary SPI pins (SDO, SDI, SCK, CS0) from your Processor and Function Board are connected to the microSD Socket.
Note: Note that the CS pin on the MicroMod Main Board - Single is on Processor Board's D1 while the MicroMod Main Board - Double is on the Processor Board's G4.
There are three LEDs on the board:
The following five jumpers are included on both the Single and Double Main Boards.
Included only on the Double Main Board are two 1x3 male headers with 2-pin jumper shunts to enable the 3.3V voltage regulator for any Function Board connected to Function Zero and Function One using alternative Processor GPIO pins. Since certain processors have limited GPIO and may not be broken out on certain locations, alternative pins have been provided on the board. The ALT PWR EN0 jumper allows users to control the 3.3V voltage regulator on any Function Board that is connected to Function Zero. When the jumper shunt is on the left side toward the 2-pin JST connector, the jumper shunt connects the PWR EN0 to the Processor Board's GPIO G5 pin. Moving the jumper shunt to the other side connects the Processor Board's GPIO G5 pin to Function Board One's GPIO G3 pin.
The ALT PWR EN1 jumper allows users control power from the 3.3V voltage regulator for any Function Board that is connected to Function One when the jumper shunt is connecting PWR EN1 and Processor Board's GPIO G6 pin. Moving the jumper shunt to the other side connects the Processor Board's GPIO G6 pin to Function Board One's GPIO G4 pin.
Qwiic and I2CThe board includes a vertical and horizontal Qwiic connector. These are connected to the primary I2C bus and 3.3V power on both the Processor and Function Board connectors allowing you to easily add a Qwiic-enabled device to your application.
Note that there are two mounting holes for Qwiic-enabled boards that have a standard 1.0"x1.0" size board. The image below highlighted with a black square is where you would place the board.
MicroMod PinoutDepending on your window size, you may need to use the horizontal scroll bar at the bottom of the table to view the additional pin functions. Note that the M.2 connector pins on opposing sides are offset from each other as indicated by the bottom pins where it says (Not Connected)*. There is no connection to pins that have a "-" under the primary function.
The board dimension of the MicroMod Main Board - Single is 2.90" x 3.40" while the MicroMod Main Board - Double is 2.90" x 4.90". Both boards include 5x mounting holes. Four are located on the edge of each board. The fifth mounting hole is located 0.80" away from another mounting hole to mount Qwiic-enabled boards that have the standard 1.0"x1.0" size board.
Note: You'll notice that the Main Boards have the USB C connector, microSD card socket, and Qwiic connector on one side of the board. This is part of the design for users deciding to place the MicroMod Main Board in an enclosure. The JST connector for the LiPo battery is facing in toward the board is also part of the design. Users can insert a LiPo battery and have its wires neatly tucked into their enclosure.
Hardware HookupIf you have not already, make sure to check out the Getting Started with MicroMod: Hardware Hookup for information on inserting your Processor and Function Boards to the Main Board.
USBTo program and power the Main Board, you will need to insert the USB-C cable into the USB connector. We will leave the other end disconnected when connecting a Processor or Function board to the Main Board.
When the boards are secure, insert the other end to a computer. When you are finished programming the processor, you can use a USB battery via the USB connector or LiPo battery via the JST connector to power the board.
Processor BoardAlign the Processor Board's key into its M.2 connector's socket. Insert the board at an angle (~25°), push down, and tighten the screw. In this case, we had the MicroMod Artemis Processor Board secured in the M.2 connector socket. Depending on your application, you may have a different Processor Board.
Function BoardsAlign the Function Board's key into its M.2 connector's socket. Insert the board at an angle (~25°), push down, and tighten one of the screw to hold the board down. Attach the second screw on the other side of the board. Once the board is aligned, tighten both screws fully to secure the board. In this case, we had the Environmental Function Board secured in the M.2 connector socket. Depending on your application, you may have a different Function Board.
If you decide to have two function boards attached to the Main Board - Double, we recommend tightening the screw between the two Function Boards first to hold them down before attaching the remaining screws on either side of the Function Boards. In this case, we had the WiFi Function Board and the Environmental Function Board secured in the M.2 connector socket. Depending on your application, you may have different function boards.
Single Cell LiPo BatteryNote: You may notice a film that is covering over the switch. This is used by the pick and place machine to pick the component up from the reel and place it on the PCB. You will need to peel the film back to access the switches and adjust the charge rate.
A precision flat head (or a tiny, rounded object) is needed to set the charge rate for your single cell LiPo battery. When the switch is flipped to the ON position on the 500mA side, the charge rate will be 500mA. When the switch is flipped to the ON position on the 100mA side, the charge rate will be 100mA. When the switch is flipped to the ON position on both the 100mA and 500mA sides, the charge rate will be 166mA.
For mobile applications, attach a single cell LiPo battery to the 2-pin JST connector. Attach a USB cable to a USB port or charger when the battery is low to begin charging.
To remove the LiPo battery, you can pull the white JST connector away from the socket while also wiggling the connector side to side using your thumb and index finger.
Qwiic-Enabled DevicesTo Qwiic-ly connect I2C devices, simply insert a Qwiic cable between one of the MicroMod Main Board's Qwiic ports and your Qwiic device.
If you need to mount a Qwiic-enabled board to the MicroMod Main Board, you can grab some standoffs and mount a standard Qwiic 1.0"x1.0" sized board using the two mounting holes near the USB Type C connector. Place the standoff between the boards and tighten the screws to mount. The image below used standoffs with built-in threads.
MicroSD CardWith power removed from the board, insert a microSD card (with the pins facing toward the board) into the socket. You'll hear a nice click indicating that the microSD card is locked in place.
To remove, make sure power is off and press the microSD card into the socket to eject. You'll hear a nice click indicating that the card is ready to be removed from the socket.
Software Installation Arduino Board Definitions and DriverWe'll assume that you installed the necessary board files and drivers for your Processor Board. In this case, we used the MicroMod Artemis Processor Board which uses the CH340 USB-to-serial converter. If you are using a Processor Board, make sure to check out its hookup guide for your Processor Board.
Installing Board Definitions in the Arduino IDESeptember 9, 2020
How do I install a custom Arduino board/core? It's easy! This tutorial will go over how to install an Arduino board definition using the Arduino Board Manager. We will also go over manually installing third-party cores, such as the board definitions required for many of the SparkFun development boards.
Arduino ExamplesLet's go over a few basic examples to get started with the MicroMod Main Board Single and Double. We'll toggle the 3.3V voltage regulator and log data to a microSD card on both boards.
Example 1: MicroMod Main Board - Single Enable Function BoardIf you have not already, select your Board (in this case the MicroMod Artemis), and associated COM port. Copy and paste the code below in your Arduino IDE. Hit the upload button and set the serial monitor to 115200 baud.
language:c
/******************************************************************************
WRITTEN BY: Ho Yun "Bobby" Chan
@ SparkFun Electronics
DATE: 10/19/2021
GITHUB REPO: https://github.com/sparkfun/SparkFun_MicroMod_Main_Board_Single
DEVELOPMENT ENVIRONMENT SPECIFICS:
Firmware developed using Arduino IDE v1.8.12
========== DESCRIPTION==========
This example code toggles the Function Board's AP2112 3.3V voltage
regulator's enable pin. The Function Boards built-in power LED should blink.
This example is based on Arduino's built-in Blink Example:
https://www.arduino.cc/en/Tutorial/BuiltInExamples/Blink
Note that this example code uses the MicroMod Main Board - Single. The MicroMod
Main Board - Double routes the PWR_EN# pins slightly different for the
two function boards.
========== HARDWARE CONNECTIONS ==========
MicroMod Artemis Processor Board => MicroMod Main Board - Single => Function Board
Feel like supporting open source hardware?
Buy a board from SparkFun!
MicroMod Artemis Processor Board - https://www.sparkfun.com/products/16401
MicroMod Main Board - Single - https://www.sparkfun.com/products/18575
MicroMod Environmental Function Board - https://www.sparkfun.com/products/18632
LICENSE: This code is released under the MIT License (http://opensource.org/licenses/MIT)
******************************************************************************/
/*Define the power enable pins for the processor board with either SDIO_DATA2 or A1.
Depending on the processor board, the Arduino pin may be different.
Note: Certain Processor Boards like the Artemis have SDIO_Data2 and A1 available
to control the Function Board's voltage regulator. SAMD51, ESP32, and STM32
Processor Board pins do not have SDIO Data 2, so users will need to reference
the Processor Pin A1. Below are a few examples. */
//ARTEMIS
#define PWR_EN0 4 //Function Board 0's "PWR_EN0" pin <= MicroMod SDIO_DATA2 => Artemis Processor Board (D4)
//Alternative option that does the same thing. Make sure to just choose one for PWR_EN0
//#define PWR_EN0 35 //Function Board 0's "PWR_EN0" pin <= MicroMod A1 => Artemis Processor Board (A35)
//TEENSY
//#define PWR_EN0 15 //Function Board 0's "PWR_EN0" pin <= MicroMod A1 => Teensy Processor Board (A1)
//SAMD51
//#define PWR_EN0 18 //Function Board 0's "PWR_EN0" pin <= MicroMod A1 => SAMD51 Processor Board (18)
void setup() {
// initialize the digital pin as an output.
pinMode(PWR_EN0, OUTPUT);
}
void loop() {
digitalWrite(PWR_EN0, HIGH); // turn the 3.3V regulator on (HIGH is the voltage level)
delay(5000); // wait for a few seconds to do something with the function boards
digitalWrite(PWR_EN0, LOW); // turn the 3.3V regulator off by making the voltage LOW
delay(5000); // wait for a few seconds before turning function boards back on
}
After uploading, take a look at your Function Board's PWR LED. The LED will be on for about 5 seconds and then turn off for another 5 seconds. It will continue to repeat until power is removed from the MicroMod Main Board - Single.
Example 2: MicroMod Main Board - Double Enable Function BoardsIf you have not already, select your Board (in this case the MicroMod Artemis), and associated COM port. Copy and paste the code below in your Arduino IDE. Hit the upload button and set the serial monitor to 115200 baud.
language:c
/******************************************************************************
WRITTEN BY: Ho Yun "Bobby" Chan
@ SparkFun Electronics
DATE: 10/19/2021
GITHUB REPO: https://github.com/sparkfun/SparkFun_MicroMod_Main_Board_Double
DEVELOPMENT ENVIRONMENT SPECIFICS:
Firmware developed using Arduino IDE v1.8.12
========== DESCRIPTION==========
This example code toggles the Function Board's AP2112 3.3V voltage
regulator's enable pin. The Function Boards built-in power LED should blink.
This example is based on Arduino's built-in Blink Example:
https://www.arduino.cc/en/Tutorial/BuiltInExamples/Blink
Note that this example code uses the MicroMod Main Board - Double. The MicroMod
Main Board - Single routes the PWR_EN0 pin slightly different for the
function board.
========== HARDWARE CONNECTIONS ==========
MicroMod Artemis Processor Board => MicroMod Main Board - Double => Function Boards
Feel like supporting open source hardware?
Buy a board from SparkFun!
MicroMod Artemis Processor Board - https://www.sparkfun.com/products/16401
MicroMod Main Board - Double - https://www.sparkfun.com/products/18576
MicroMod Environmental Function Board - https://www.sparkfun.com/products/18632
LICENSE: This code is released under the MIT License (http://opensource.org/licenses/MIT)
******************************************************************************/
/*Define the power enable pins for the processor board with SDIO_DATA2.
Depending on the processor board, the Arduino pin may be different.
Note: Certain Processor Boards like the Artemis have more than one pin available
to control the Function Board's voltage regulator (e.g. SDIO_DATA2 and G5).
SAMD51, ESP32, and STM32 Processor Board pins do not have SDIO Data 2, so
users will need to reference the Processor Pin G5. Below are a few examples. */
//ARTEMIS
#define PWR_EN0 4 //Function Board 0's "PWR_EN0" pin <= MicroMod SDIO_DATA2 => Artemis Processor Board (D4)
#define PWR_EN1 26 //Function Board 1's "PWR_EN1" pin <= MicroMod SDIO_DATA1 => Artemis Processor Board (D26)
//Alternative option that does the same thing. Make sure to just choose one for PWR_EN0 and PWR_EN1
//#define PWR_EN0 29 //Function Board 0's "PWR_EN0" pin <= MicroMod G5 => Artemis Processor Board (A29)
//#define PWR_EN1 14 //Function Board 1's "PWR_EN0" pin <= MicroMod G6 => Artemis Processor Board (D14)
//TEENSY
//#define PWR_EN0 39 //Function Board 0's "PWR_EN0" pin <= MicroMod SDIO_DATA2 => Teensy Processor Board (D39)
//#define PWR_EN1 34 //Function Board 1's "PWR_EN1" pin <= MicroMod SDIO_DATA1 => Teensy Processor Board (D34)
//Alternative option that does the same thing. Make sure to just choose one for PWR_EN0 and PWR_EN1
//#define PWR_EN0 45 //Function Board 0's "PWR_EN0" pin <= MicroMod G5 => Teensy Processor Board (45)
//#define PWR_EN1 6 //Function Board 1's "PWR_EN1" pin <= MicroMod G6 => Teensy Processor Board (6)
//Note: The SAMD51, ESP32, and STM32 Processor Board Pins do not have SDIO Data 2 and SDIO Data 1.
//SAMD51
//#define PWR_EN0 7 //Function Board 0's "PWR_EN0" pin <= MicroMod G5 => SAMD51 Processor Board (D7)
//#define PWR_EN1 8 //Function Board 1's"PWR_EN1" pin <= MicroMod G6 => SAMD51 Processor Board (D8)
//ESP32
//#define PWR_EN0 32 //Function Board 0's "PWR_EN0" pin <= MicroMod G5 => ESP32 Processor Board (32)
//#define PWR_EN1 33 //Function Board 1's"PWR_EN1" pin <= MicroMod G6 => ESP32 Processor Board (33)
void setup() {
// initialize the digital pins as an output.
pinMode(PWR_EN0, OUTPUT);
pinMode(PWR_EN1, OUTPUT);
}
void loop() {
digitalWrite(PWR_EN0, HIGH); // turn the 3.3V regulator on (HIGH is the voltage level)
digitalWrite(PWR_EN1, HIGH); // turn the 3.3V regulator on (HIGH is the voltage level)
delay(5000); // wait for a few seconds to do something with the function boards
digitalWrite(PWR_EN0, LOW); // turn the 3.3V regulator off by making the voltage LOW
digitalWrite(PWR_EN1, LOW); // turn the 3.3V regulator off by making the voltage LOW
delay(5000); // wait for a few seconds before turning function boards back on
}
After uploading, take a look at the PWR LEDs on the Function Boards. The LEDs will be on for about 5 seconds and then turn off for another 5 seconds. It will continue to repeat until power is removed from the MicroMod Main Board - Double.
Example 3: Reading and Writing to a MicroSD Card Note:For the MicroMod Teensy, make sure to check out the SdFat library included with the Teensyduino add-on. You'll need to modify the macro's value for the CS pin for the microSD card from:
#define SD_CS_PIN SS//TEENSY
#define SD_CS_PIN 5 // The microSD Card CS pin is D1 for the MicroMod Main Board - Single and Teensy Processor (5). Adjust for your processor if necessary.
//#define SD_CS_PIN 44 // The microSD Card's CS pin is G4 for the MicroMod Main Board - Double and Teensy Processor (44). Adjust for your processor if necessary.The example below uses the built-in SD Arduino library. The only difference in the code is the CS pin for the microSD card, which you will need to adjust for your processor board (in this case we use the Artemis Processor Board). Make sure to reference your Processor Board's CS pin for either the Main Board - Single (D1) or Main Board - Double (G4).
Note: The SPI pins will be defined as macros with your processor's board definitions so we won't need to define COPI, CIPO, or CLK pins. Sweet!
If you have not already, select your Board (in this case the MicroMod Artemis), and associated COM port. Copy and paste the code below in your Arduino IDE. Hit the upload button and set the serial monitor to 9600 baud.
language:c
/*
SD Card Read/Write
This example shows how to read and write data to and from an SD card file
The circuit:
SD card attached to SPI bus as follows:
SD Card - MicroMod Artemis Processor Board
-----------------------------------
COPI/SDO - pin 38
CIPO/SDI - pin 43
CLK - pin 42
CS - pin 1 (Main Board - Single) or 28 (Main Board - Double)
created Nov 2010
by David A. Mellis
modified 9 Apr 2012
by Tom Igoe
This example code is in the public domain.
*/
#include <SPI.h>
#include <SD.h>
//ARTEMIS
//const int SD_CS_PIN = 1; // The microSD Card CS pin is D1 for the MicroMod Main Board - Single and Artemis Processor (D1). Adjust for your processor if necessary.
const int SD_CS_PIN = 28; // The microSD Card's CS pin is G4 for the MicroMod Main Board - Double and Artemis Processor (D28). Adjust for your processor if necessary.
File myFile;
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.print("Initializing SD card...");
if (!SD.begin(SD_CS_PIN)) {
Serial.println("initialization failed!");
while (1);
}
Serial.println("initialization done.");
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
myFile = SD.open("test.txt", FILE_WRITE);
// if the file opened okay, write to it:
if (myFile) {
Serial.print("Writing to test.txt...");
myFile.println("testing 1, 2, 3.");
// close the file:
myFile.close();
Serial.println("done.");
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
// re-open the file for reading:
myFile = SD.open("test.txt");
if (myFile) {
Serial.println("test.txt:");
// read from the file until there's nothing else in it:
while (myFile.available()) {
Serial.write(myFile.read());
}
// close the file:
myFile.close();
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
}
void loop() {
// nothing happens after setup
}
If all goes well, you should see the following output if this is the first time writing to the card!
language:bash
Initializing SD card...initialization done.
Writing to test.txt...done.
test.txt:
testing 1, 2, 3.
If you are looking to go the extra mile to see if data was saved, close the Serial Monitor and remove power from the MicroMod Main Board. Eject your microSD card from the socket and insert into a microSD card adapter. Then insert the microSD card into your computer's card reader or USB port. Open the test.txt file in a text editor. You should see an output similar to what you saw in the Serial Monitor after the file was opened as shown below.
language:bash
testing 1, 2, 3.
Besides verifying the data in the file, this step is also useful if you adjust the code to continuously log data in a CSV format. After logging data, you could the open text document in a spreadsheet and graph the values!
More Examples!Sweet! Now that we know that we can read and write to the microSD card, try exploring the other examples in either the SD or SdFat Arduino libraries. Or check out the following MicroMod tutorials that have a built-in microSD card socket for ideas on data logging. Better yet, try adding a sensor and write some code to log some data!
MicroMod Asset Tracker Carrier Board Hookup GuideGet started with the SparkFun MicroMod Asset Tracker Carrier Board following this Hookup Guide. The Asset Tracker uses the u-blox SARA-R510M8S LTE-M / NB-IoT module to provide a host of data communication options.
Looking for more examples with a Function Board? Below are a few Function Board examples from our tutorials that are tagged with MicroMod.
1W LoRa MicroMod Function Board Hookup GuideEverything you need to get started with the 1W LoRa MicroMod function board; a MicroMod function board that provides LoRa capabilities for your MicroMod project. Must be used in conjunction with a MicroMod main board and processor.
MicroMod WiFi Function Board - ESP32 Hookup GuideThe MicroMod ESP32 Function Board adds additional wireless options to MicroMod Processor Boards that do not have that capability. This special function board acts as a coprocessor that takes advantage of Espressif's ESP32 WROOM to add WiFi and Bluetooth® to your applications.
MicroMod Environmental Function Board Hookup GuideThe SparkFun MicroMod Environmental Function Board adds additional sensing options to the MicroMod Processor Boards. This function board includes three sensors to monitor air quality (SGP40), humidity & temperature (SHTC3), and CO2 concentrations (STC31) in your indoor environment. To make it even easier to use, all communication is over the MicroMod's I2C bus! In this tutorial, we will go over how to connect the board and read the sensors.
Better yet, try connecting a Qwiic-enabled device to the Main Board's Qwiic connector. Below are a few examples from our tutorials that are tagged with Qwiic.
GPS-RTK Hookup GuideFind out where you are! Use this easy hook-up guide to get up and running with the SparkFun high precision GPS-RTK NEO-M8P-2 breakout board.
Qwiic Digital Indoor ThermometerQwiic-ly build a digital indoor thermometer to measure the ambient temperature of the room and display it using an OLED on an I2C bus!
SparkFun QwiicBus Hookup GuideBuild a long-range, noise-isolated I2C bus with the SparkFun QwiicBus Kit featuring the QwiicBus EndPoint and MidPoint following this Hookup Guide.
Qwiic SHIM Kit for Raspberry Pi Hookup GuideGet started with the Serial LCD with RGB backlight and 9DoF IMU (ICM-20948) via I2C using the Qwiic system and Python on a Raspberry Pi! Take sensor readings and display them in the serial terminal or SerLCD.
Troubleshooting Not working as expected and need help?If you need technical assistance and more information on a product that is not working as you expected, we recommend heading on over to the SparkFun Technical Assistance page for some initial troubleshooting.
If you don't find what you need there, the SparkFun Forums: MicroMod are a great place to find and ask for help. If this is your first visit, you'll need to create a Forum Account to search product forums and post questions.
Resources and Going FurtherNow that you've successfully got your MicroMod Main Board with a Processor Board, it's time to incorporate it into your own project! For more information, check out the resources below:
Looking for more inspiration? Check out these other tutorials related to MicroMod.
MicroMod STM32WB5MMG Hookup GuideAdd a powerful combination of computing power and wireless communication to your next MicroMod project with the SparkFun MicroMod STM32WB5MMG Processor.
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