Ensure your device works with this simple test.
examples/ble_file_transfer_simpletest.py 1# SPDX-FileCopyrightText: 2020 ladyada for Adafruit Industries
2# SPDX-License-Identifier: MIT
3
4"""
5Used with ble_uart_echo_test.py. Transmits "echo" to the UARTService and receives it back.
6"""
7
8import binascii
9import random
10import time
11
12from adafruit_ble import BLERadio
13from adafruit_ble.advertising.standard import (
14 Advertisement,
15 ProvideServicesAdvertisement,
16)
17
18import adafruit_ble_file_transfer
19
20
21def _write(client, filename, contents, *, offset=0):
22 start = time.monotonic()
23 try:
24 client.write(filename, contents, offset=offset)
25 duration = time.monotonic() - start
26 client = wait_for_reconnect()
27 except RuntimeError:
28 print("write failed. is usb connected?")
29 return client
30 print("wrote", filename, "at rate", len(contents) / duration, "B/s")
31 return client
32
33
34def _read(client, filename, *, offset=0):
35 start = time.monotonic()
36 try:
37 contents = client.read(filename, offset=offset)
38 duration = time.monotonic() - start
39 except ValueError:
40 print("missing file:", filename)
41 return b""
42 print("read", filename, "at rate", len(contents) / duration, "B/s")
43 return contents
44
45
46ble = BLERadio()
47
48peer_address = None
49
50
51def wait_for_reconnect():
52 print("reconnecting", end="")
53 while ble.connected:
54 pass
55 print(".", end="")
56 new_connection = ble.connect(peer_address)
57 print(".", end="")
58 if not new_connection.paired:
59 print(".", end="")
60 new_connection.pair()
61 new_service = new_connection[adafruit_ble_file_transfer.FileTransferService]
62 new_client = adafruit_ble_file_transfer.FileTransferClient(new_service)
63 print(".", end="")
64 time.sleep(2)
65 print("done")
66 return new_client
67
68
69# ble._adapter.erase_bonding()
70# print("erased")
71while True:
72 try:
73 while ble.connected:
74 for connection in ble.connections:
75 if adafruit_ble_file_transfer.FileTransferService not in connection:
76 continue
77 if not connection.paired:
78 print("pairing")
79 connection.pair()
80 print("paired")
81 print()
82 service = connection[adafruit_ble_file_transfer.FileTransferService]
83 client = adafruit_ble_file_transfer.FileTransferClient(service)
84
85 print("Testing write")
86 client = _write(client, "/hello.txt", b"Hello world")
87 time.sleep(1)
88 c = _read(client, "/hello.txt")
89 print(len(c), c)
90 print()
91
92 print("Testing mkdir")
93 try:
94 client.mkdir("/world/")
95 except ValueError:
96 print("path exists or isn't valid")
97 print(client.listdir("/"))
98 print(client.listdir("/world/"))
99 print()
100
101 print("Test writing within dir")
102 client = _write(client, "/world/hi.txt", b"Hi world")
103
104 hello_world = b"Hello world"
105 client = _write(client, "/world/hello.txt", hello_world)
106 c = _read(client, "/world/hello.txt")
107 print(c)
108 print()
109
110 # Test offsets
111 print("Testing offsets")
112 hello = len(b"Hello ")
113 c = _read(client, "/world/hello.txt", offset=hello)
114 print(c)
115
116 client = _write(client, "/world/hello.txt", b"offsets!", offset=hello)
117 c = _read(client, "/world/hello.txt", offset=0)
118 print(c)
119 print()
120
121 # Test deleting
122 print("Testing delete in /world/")
123 print(client.listdir("/world/"))
124 try:
125 client.delete("/world/hello.txt")
126 except ValueError:
127 print("delete failed")
128
129 try:
130 client.delete("/world/")
131 print("deleted /world/")
132 except ValueError:
133 print("delete failed")
134 print(client.listdir("/world/"))
135 try:
136 client.delete("/world/hi.txt")
137 except ValueError:
138 pass
139 try:
140 client.delete("/world/")
141 except ValueError:
142 pass
143 print()
144
145 # Test move
146 print("Testing move")
147 print(client.listdir("/"))
148 try:
149 client.move("/hello.txt", "/world/hi.txt")
150 except ValueError:
151 pass
152 try:
153 client.move("/hello.txt", "/hi.txt")
154 except ValueError:
155 print("move failed")
156 print(client.listdir("/"))
157 client.delete("/hi.txt")
158 print()
159
160 # Test larger files
161 print("Testing larger files")
162 large_1k = bytearray(1024)
163 for i, _ in enumerate(large_1k):
164 large_1k[i] = random.randint(0, 255)
165 client = _write(client, "/random.txt", large_1k)
166 contents = _read(client, "/random.txt")
167 if large_1k != contents:
168 print(binascii.hexlify(large_1k))
169 print(binascii.hexlify(contents))
170 raise RuntimeError("large contents don't match!")
171 print()
172 time.sleep(20)
173 except ConnectionError:
174 pass
175
176 print("disconnected, scanning")
177 for advertisement in ble.start_scan(ProvideServicesAdvertisement, Advertisement, timeout=1):
178 # print(advertisement.address, advertisement.address.type)
179 if (
180 not hasattr(advertisement, "services")
181 or adafruit_ble_file_transfer.FileTransferService not in advertisement.services
182 ):
183 continue
184 ble.connect(advertisement)
185 peer_address = advertisement.address
186 print("connected to", advertisement.address)
187 break
188 ble.stop_scan()
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