24-10-2015, 06:53
Today I checked the connections on the 7809 regulator. There was 12V input and 8.94V output. Most of the 5V connections on the board showed 5.01V.
Another thing that I noticed whilst testing the Rx board, was that if the board only had the USB connection or the power connection plugged in, not both, then the Rx unit seemed to be receiving the data from the Tx unit. When both the USB and power connection were plugged in, the Rx seemed to lose connection with the Tx unit.
I thought maybe some of the solder connections to the Nano were maybe a little light on solder, so re-soldered all of the Nano connections. After that I restarted the Rx board and it seemed to work perfectly for about 20 minutes with both the USB and power connections plugged in. After the 20 minutes, the Rx board stopped responding again, both as far as the Tx LED flashing and connection to Cumulus goes. I ended up removing the power connection, restarting Cumulus and everything went back to working on the USB connection.
Another thing that I noticed whilst testing the Rx board, was that if the board only had the USB connection or the power connection plugged in, not both, then the Rx unit seemed to be receiving the data from the Tx unit. When both the USB and power connection were plugged in, the Rx seemed to lose connection with the Tx unit.
I thought maybe some of the solder connections to the Nano were maybe a little light on solder, so re-soldered all of the Nano connections. After that I restarted the Rx board and it seemed to work perfectly for about 20 minutes with both the USB and power connections plugged in. After the 20 minutes, the Rx board stopped responding again, both as far as the Tx LED flashing and connection to Cumulus goes. I ended up removing the power connection, restarting Cumulus and everything went back to working on the USB connection.