faragher
commented
8 months ago Again with the freaking undocumented power supply changes.
DIO1 (pin 33?) is the TCXO enable. Pull it high, supposedly problem solved. I'll see if I can can test it, but I don't know the right way to set this up for RNodeConf, etc.
HPDIO1 according to the schematic, which is just IO33 through a resistor. Physical pin 13, not that it matters.
Board is marked 20210104. New FCC tag, some updated components, but appears identical to old version excepting LoRa module. I'll check to see if they have updated datasheets.
The firmware is much chattier on the serial line, but that might be from recent updates (1.61 to 1.69)
Serial output (hand modified for clarity) follows:
Radio reports up, but shows no waterfall and repeats channel data 1-2 times per second. Red and blue LEDs active, green off. On attempted transmit, green LEDs illuminates brightly and is steady on, RNode appears to freeze entirely at this time. No further serial communication is sent.
Detect seems to perform as expected:
It thinks it initializes correctly, but the waterfall display doesn't function, which gives a place to start digging. I'm going to check data sheets first, since this might be more obvious to someone more familiar with the firmware.