MySensors Node RS485
ATmega328 + MAX485 + W25X40 flash for FOTA
D7 pin used for control RS485 DE/RE input.
On long side of board present 11-pin header include:
On short side of board present two pin header include:
Present place to solder pull-up resistors for RES, D2, D3, SDA, SCL signals.
It is also possible to install LED connected between D6 pin and 5V through 510 Ohm resistor.
2 digital PWM 5 and 3 for LEDs
2 analog A0 and A1
i2c (A4 and A5) or 2 extra analog
Holes to solder a CR123 battery holder or pins
10k size 0603
220R size 0805
4.7uF size 0805
LED size 1206
PCB is same size as 18650 holder, all electronic will fit underneath
Run by atmega328p and 18650 Li-po battery with integrated USB charger and battery protection IC. Supports ATSHA204A CryptoAuth chip and DS18B20 temperature IC. Additional pins avaiable through header.