Hi Mark,
I have more or less finished boxing up the uBITX V6.
It uses the stock KD8CEC firmware on the Arduino Nano for the uBITX.
I decided to make all of the additional features separate to the Nano, using a D1 Mini ESP8266 module for control and monitoring.
? 12V reverse voltage protection and in-rush current limit.
? 5V, 1A SMPS for all additional digital logic and Nextion display.
? Voltage and current monitoring for 12V, 5V and 3V3 rails.
? RX audio with SSM2167 (AGC) and LM386 amplifier. Volume and AGC configured via digital pots.
? TX audio with SSM2167 (AGC). Mic level and compression configured via digital pots.
? PWR/SWR bridge
? Provision for temperature monitoring.
? Cooling fan controlled using temperature and/or supply current levels.
? OLED display for Volume, VI monitoring, Pfwd/Pref/VSWR and other parameters.
All addon features can be controlled/monitored over WIFI using MQTT with NodeRed.
I may add a serial bridge between the NANO and D1 Mini to allow for WIFI control and monitoring of the uBITX (using the CAT commands).
A few pictures attached.
73, Dave
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