Hi everyone,
I’m having trouble with a Waveshare ESP32-S3 A7670E 4G Development Board and the built-in SIMCOM A7670E modem, and I’m hoping someone with more experience can point me in the right direction.
Setup / context
• Board: Waveshare ESP32-S3 A7670E 4G Development Board
• IDE: Arduino DIE installed all libraries und dependencies
• Network: internet.telekom.de, internet.t-d1.de
• Planned use case: GPS tracker for a Traccar server
o Get position via GNSS/GPS
o Send data via HTTP POST to Traccar Server OsmAnd
What worked at the beginning
When I first started using the board with both Antenna:
• The LTE/4G modem registered successfully in the Telekom mobile network with public ip
• The red LED on the SIMCOM A7670E was blinking every ~2 seconds (normal registration state).
• AT commands worked as expected.
What I changed
I then started flashing the board with different firmware versions because I wanted to get GNSS/GPS working.
To speed things up, I tried adapting code from a LilyGO board that uses the same SIMCOM modem:
https://github.com/Xinyuan-LilyGO/LilyGo-Modem-Series/tree/main/examples/Traccar
I did not change:
• The DIP switches
• The SIM card
• Any hardware on the board (Antennas or GPIO Pins or Power delivery)
Only the Code on the ESP32-S3 has been changed (multiple times).
Current problem / symptoms
Now the modem behaves completely differently:
• The red LED on the SIMCOM A7670E is solid on (no blinking at all).
• The module does not respond to AT commands anymore via UART GPIO 17 und GPIO 18.
• Network registration is consistently rejected -> +CEREG: 0,3
It feels like the modem is either stuck in some strange state or possibly misconfigured/“bricked” by one of the sketches I flashed.
Questions
1. Could the LilyGO example code (or other sketches) have changed some low-level configuration, NVRAM, or even the firmware of the SIMCOM A7670E so that it no longer responds?
2. Is there a way to “factory reset” or recover the SIMCOM A7670E on this board? For example:
o Special AT commands (if I can somehow get it to respond again)
o Forcing a firmware reflash via some boot pin or test pad
o Hardware reset procedure specific to this Waveshare board
3. Has anyone successfully used GNSS + HTTP POST (or Traccar) on this exact Waveshare ESP32-S3 A7670E 4G board? Can’t find anything on the web
o Any working example code or minimal sketch you could share would be very helpful.
Any hints on how to unbrick / revive the modem or how to correctly initialize GNSS and data connections on this board would be greatly appreciated.
Thanks in advance for any help or ideas!
I just wonder why you try this while you can connect a 20$ gps tracker instantly to traccar server?
Hi everyone,
I’m having trouble with a Waveshare ESP32-S3 A7670E 4G Development Board and the built-in SIMCOM A7670E modem, and I’m hoping someone with more experience can point me in the right direction.
Setup / context
• Board: Waveshare ESP32-S3 A7670E 4G Development Board
• IDE: Arduino DIE installed all libraries und dependencies
• Network: internet.telekom.de, internet.t-d1.de
• Planned use case: GPS tracker for a Traccar server
o Get position via GNSS/GPS
o Send data via HTTP POST to Traccar Server OsmAnd
What worked at the beginning
When I first started using the board with both Antenna:
• The LTE/4G modem registered successfully in the Telekom mobile network with public ip
• The red LED on the SIMCOM A7670E was blinking every ~2 seconds (normal registration state).
• AT commands worked as expected.
What I changed
I then started flashing the board with different firmware versions because I wanted to get GNSS/GPS working.
To speed things up, I tried adapting code from a LilyGO board that uses the same SIMCOM modem:
https://github.com/Xinyuan-LilyGO/LilyGo-Modem-Series/tree/main/examples/Traccar
I did not change:
• The DIP switches
• The SIM card
• Any hardware on the board (Antennas or GPIO Pins or Power delivery)
Only the Code on the ESP32-S3 has been changed (multiple times).
Current problem / symptoms
Now the modem behaves completely differently:
• The red LED on the SIMCOM A7670E is solid on (no blinking at all).
• The module does not respond to AT commands anymore via UART GPIO 17 und GPIO 18.
• Network registration is consistently rejected -> +CEREG: 0,3
It feels like the modem is either stuck in some strange state or possibly misconfigured/“bricked” by one of the sketches I flashed.
Questions
1. Could the LilyGO example code (or other sketches) have changed some low-level configuration, NVRAM, or even the firmware of the SIMCOM A7670E so that it no longer responds?
2. Is there a way to “factory reset” or recover the SIMCOM A7670E on this board? For example:
o Special AT commands (if I can somehow get it to respond again)
o Forcing a firmware reflash via some boot pin or test pad
o Hardware reset procedure specific to this Waveshare board
3. Has anyone successfully used GNSS + HTTP POST (or Traccar) on this exact Waveshare ESP32-S3 A7670E 4G board? Can’t find anything on the web
o Any working example code or minimal sketch you could share would be very helpful.
Any hints on how to unbrick / revive the modem or how to correctly initialize GNSS and data connections on this board would be greatly appreciated.
Thanks in advance for any help or ideas!