January 2022

Steve showed the updated version of his Wemos D1 baseboard, called the "Wifi Platform".

Additional to sockets for the Wemos D1 & breakout headers the board also supports

• UPS with LiPo charger & battery and power path modification for the TP4056 charger.

• Battery voltage monitoring

• MOSFET switch cuts all power to 3.3V. Software control of MOSFET.

• I2C connector for OLED displays

• On board DHT temperature & humidity sensor

• TPL5010 micro power auto wake up IC. Timer duration set by resistors, 170K = 2hrs.

• Circuit diagram is here : https://drive.google.com/file/d/1GjtIPxp3jvZPv1gt5sDWeKKzjxBnHYcr/view?usp=sharing

• Photo below shows paper print out of PCB, scale 1:1 for trial fit in UB3 enclosure.

Photo below shows the version 1 board with the version 2 design modifications hand wired. The new design was fully tested before releasing the new PCB for manufacture.

ALEX introduced 'Technobytes' as a regular item on the meeting agenda.

See https://thehardcoder.weebly.com/technobites.html for Alex's Technobytes page at his 'Hardcoder' web site.