BLE [Errno 12] ENOMEM
Posted: Wed Aug 05, 2020 6:17 pm
I have been working with the ble_temperature and ble_temperature_central examples (https://github.com/micropython/micropyt ... /bluetooth). I have 2 PYBD-SF6W running MicroPython v1.12-652-gcaaaa2b1f , running a file on each one of them. I am running the ble_temperature_central.py file without any modifications, and modify the paramaters in the while loop at the bottom of ble_temperature.py
My understanding is that this would send a notification to the central every 50 ms. On the board running the central, I get an OSError: [Errno 12] ENOMEM error.
Additionally, when I reduce the loop to something like 20 ms on ble_temperature file, I get the OSError: [Errno 12] ENOMEM error on the peripheral.
If I do not use notifications, and simply write , then I don't see any errors on either the central or peripheral, even with 20 ms updates.
Is there a way to check if memory is available before issuing a notification?
Code: Select all
def demo():
ble = bluetooth.BLE()
temp = BLETemperature(ble)
t = 25
i = 0
while True:
# Write every second, notify every 10 seconds.
i = (i + 1) % 1
temp.set_temperature(t, notify=i == 0, indicate=False)
# Random walk the temperature.
t += random.uniform(-0.5, 0.5)
time.sleep_ms(50)Code: Select all
>>> ble_tc.demo()
Found sensor: 0 b'HJ0\x01\xe5\xd2' mpy-temp
Connected
16.39
14.04
13.16
11.9
13.55
11.55
8.74
10.99
10.48
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "ble_tc.py", line 251, in demo
File "ble_tc.py", line 209, in read
OSError: [Errno 12] ENOMEM
Code: Select all
>>> ble_temperature.demo()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "ble_temperature.py", line 86, in demo
File "ble_temperature.py", line 67, in set_temperature
OSError: [Errno 12] ENOMEM
Code: Select all
def demo():
ble = bluetooth.BLE()
temp = BLETemperature(ble)
t = 25
i = 0
while True:
# Write every second, notify every 10 seconds.
i = (i + 1) % 1
temp.set_temperature(t, notify=False, indicate=False)
# Random walk the temperature.
t += random.uniform(-0.5, 0.5)
time.sleep_ms(20)