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adafruit / Adafruit_CircuitPython_RFM9x

CircuitPython module for the RFM95/6/7/8 LoRa wireless 433/915mhz packet radios.
MIT License
68 stars 45 forks source link

set RESET to Pull.UP when set to input #2

Closed jerryneedell closed 6 years ago

jerryneedell commented 6 years ago

This fixes the generation of the RESET signal to the RFM9x chip for CP3.0 - I'm still not sure why it worked on 2.x but this change works on both 2.x and 3.0.

The reset sequence for the RFM9x is far more complex than the one for the RFM69, but as Tony noted, it works this way. When I tried the same sequence in the RFM69, it did not work and resulted in a corrupted File System on my feather_m0. So for now, let stick with this ;-)

I tested this with a pair of rfm9x featherwings attached to a feather_m0_express and a feather_m0_supersized (8Mbyte SPI flash) with both CP3.0 master and CP 2.2..4.

I did find that it works well with the default baudrate setting (10000000) as long as the wing is plugged directly into the feather. I had some transmission errors when I used a "doubler". It has been reported before for the rfm69 that it may be necessary to lower the baud rate for breakout boards and even apparently for any separation of the boards.

jerryneedell commented 6 years ago

Sure - I'll update the README