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hardware_flash.md: move some info to wiki

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closes #628
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Bernhard Kirchen 2024-03-19 20:01:25 +01:00 committed by GitHub
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@ -49,9 +49,7 @@ The SN65HVD230 CAN bus transceiver is used to interface with the Pylontech batte
### MCP2515 CAN bus module
The MCP2515 CAN bus module consists of a CAN bus controller and a CAN bus transceiver and is used to interface with the Huawei AC charger. This CAN bus operates at 125kbit/s. The module is connected via SPI and currently requires a separate SPI bus. If you want to use the Huawei AC charger make sure to get an ESP which supports 2 SPI busses. Currently the SPI bus host is hardcoded to number 2. This may change in future. Please note: Using the Huawei AC charger in combination with the CMT2300A radio board is not supported at the moment.
MCP2515 CAN bus modules that are widely available are designed for 5V supply voltage. To make them work with 3.3V / the ESP32 a modification is required. [This modification is described here.](https://forums.raspberrypi.com/viewtopic.php?t=141052)
See [Wiki](https://github.com/helgeerbe/OpenDTU-OnBattery/wiki/Huawei-AC-PSU) for details.
### Relay module