PCB for OpenDTU in Cable Branchbox, LineSupply w. Fuses, RS485/RS232-Olimex, Relais, DS2485 OneWire, I2C-Header...
Mechanically fits into quite compact HNS 989861-H01 wiring box (form closure only). If not all features are used, even edged Wieland-Socket should fit. LEDs need LightGuides: no. position-drawing and not included in material list
Tradeoff: Very limited space, copyrighted code for ds2485
image::ESP-SolarV1.jpg
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WESP32-WROOM-based (internal or external antenna)
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5x20 Fuseholder (Supply)
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Varistor
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HiLink Supplymodule f.e. 230V->3.3V
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5x20 Fuseholder (Relais)
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Relais SANYOU 10A
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modern 1Wire-Controler DS2485
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programming Header (Shelly-Pinout)
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I2C+VCC+GND header
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2x5 Ribbon Connector for Olimex' RS485/RS232-Modules
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LEDs (green: power, red:active, or:DS2485 GPIO)
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TTL serial connector f.e. for IR-Energy reading
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robust cage clamps for external connections
The board was done for differend scenarios including HoymilesDTU, using different RF-Modules, reading the new IR-Energy counters with "Volkszähler", measure distributed temerature locations with OneWire-Sensors and control of pool pump or heating elements, maybe some IR motion detection in the garage, interfacing RS485/Modbus/RS232 for Solar-Inverters etc. - CAN- and metering bus are missing, though.
Would be great to hear how you used it or modified it for!