Hello all.
I had very noisy readings of the 12v ADC. I tried to play with calibration values, but no luck with it. Eventually I have connected 0.1 µF capacitor to the ADC input, like described at "Minimizing Noise" article: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/adc.html
It might be worth considering this modification for the next hardware version.

вт, 17 авг. 2021 г. в 08:31, Mark Webb-Johnson <mark@webb-johnson.net>:
For the 4G modem options we need to go through FCC, CE, and ROHS certification. Minimising/eliminating the changes to the main board simplifies this (and brings down the exorbitant costs) but if there is anything urgent / necessary, now is the time to do it.

The goal here is to maintain 100% compatibility with existing OVMS main boards, to keep this is a simple and relatively cheap upgrade of the modem board.

So far, I have come up with this minimal list:

  1. Main board v3.3: Improve soldering of micro USB port. Bigger solder pads, and more solder to secure it better.

  2. Modem board v1.3: Add support for SIM7600 module.

  3. Modem board v1.3: Fix support for DTR sleep/awake support.

Is there anything else required for this update?

Regards, Mark.

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