[Ovmsdev] OVMS v3.3 hardware

Mark Webb-Johnson mark at webb-johnson.net
Wed Aug 18 08:56:50 HKT 2021


Sounds reasonable and sensible. I will add it to the list.

Regards, Mark.

> On 17 Aug 2021, at 3:56 PM, Alexander K <alexander.kiiash at gmail.com> wrote:
> 
> 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 <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 at webb-johnson.net <mailto:mark at 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:
> 
> Main board v3.3: Improve soldering of micro USB port. Bigger solder pads, and more solder to secure it better.
> 
> Modem board v1.3: Add support for SIM7600 module.
> 
> 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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