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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 ### 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. See [Wiki](https://github.com/helgeerbe/OpenDTU-OnBattery/wiki/Huawei-AC-PSU) for details.
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)
### Relay module ### Relay module