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GitHub - syssi/esphome-pipsolar: ESPHome component to monitor and control a pipsolar inverter via RS232
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2400-2525MHz RS232 Wireless Transceiver Module RF UART Board for Wifi ESP8266 NodeMCU PC Serial port COM Printers
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Wire up your own RS-232 WiFi modem for under $10 using ESP8266 and Zimodem firmware. | Sub-Etha Software
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