Hi all,
I just received a HM4.3 with a Pi Zero W that was built by a board member for me. I've been troubleshooting it with him, but our schedules are totally opposite, so I thought I'd reach out to the rest of the board too.
When I first got it, I plugged it in, tested the physical functionality of the unit (IE the fan/servo in manual mode, testing probes, buttons, etc), and everything worked well. At that point, I pulled the SD card, corrected the config.txt file for my wifi network, reassembled and went into the backend.
I can browse all of the Pi OS options, but if I click into the Linkmeter/Configuration page, I get a no communication error.
I followed the 2nd suggestion and attempted to flash the hex file from /lib/firmware, and get an AVR Fuses error.
From there, I followed Bryan's suggestions in this post.
Everything is as he describes in that post... +/- 3.3V at RST, 3.3 at VCC and AVC, continuity from GND at the Barrel to both GND and AGN at the Microcontroller. There is continuity between the ATMega and Pi Header at MO and MOS, MI and MIS, SCK and SCK, and RST and G25, and none of the pins on the pi header have continuity with ground or adjacent pins.
I did note and correct a short between SCL and G4 on the pi header. I also noted a potential issue on the corner of the board where the thermocoupler would attach (mine is thermister on all 4 jacks), and cleaned up a solder bridge there (see pics).
Here are some pics of my boards, so hopefully you guys can help me identify any other issues... Aside from that, any suggestions how to proceed here?
Pics are here
Thanks in advance.
I just received a HM4.3 with a Pi Zero W that was built by a board member for me. I've been troubleshooting it with him, but our schedules are totally opposite, so I thought I'd reach out to the rest of the board too.
When I first got it, I plugged it in, tested the physical functionality of the unit (IE the fan/servo in manual mode, testing probes, buttons, etc), and everything worked well. At that point, I pulled the SD card, corrected the config.txt file for my wifi network, reassembled and went into the backend.
I can browse all of the Pi OS options, but if I click into the Linkmeter/Configuration page, I get a no communication error.
I followed the 2nd suggestion and attempted to flash the hex file from /lib/firmware, and get an AVR Fuses error.
From there, I followed Bryan's suggestions in this post.
Everything is as he describes in that post... +/- 3.3V at RST, 3.3 at VCC and AVC, continuity from GND at the Barrel to both GND and AGN at the Microcontroller. There is continuity between the ATMega and Pi Header at MO and MOS, MI and MIS, SCK and SCK, and RST and G25, and none of the pins on the pi header have continuity with ground or adjacent pins.
I did note and correct a short between SCL and G4 on the pi header. I also noted a potential issue on the corner of the board where the thermocoupler would attach (mine is thermister on all 4 jacks), and cleaned up a solder bridge there (see pics).
Here are some pics of my boards, so hopefully you guys can help me identify any other issues... Aside from that, any suggestions how to proceed here?
Pics are here
Thanks in advance.
Last edited: