ESP Relay Board VDC

Update Log for ESP Relay Board VDC

• 

  Latest version of ESP Relay Board VDC version V4.2

• 

  (Old version)

• 

  Schematic

• 

  VDC Relay board latest silk print 4.2

• V4.2 added voltage divider on back side of PCB, this need to be soldered manually.
• V4.1 pin headers changed to two group. RST, ADC and DHT_IO16 pins on left side now.

Analag Input A0

Back Side Jumper	Header text
Connect	No voltage divider, A0 directly connect to ESP-12 Module ADC pin.
Disconnect	A0 input via voltage divider to ADC = 220K / 100K, maximium input A0 3.3V

• Reference calculation see here: https://learn.sparkfun.com/tutorials/voltage-dividers/all