Wemos Mini and a TTP223 Capacitive Touch Sensor

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In this example we will connect a TTP223 Capacitive Touch Sensor to our Wemos Mini. The TTP223 is a touch pad detector IC which offers 1 touch key.

 

 

Connection

The TTP223 Capacitive Touch Sensor has to be connected to Uno as follows:

Vcc to 3v3 Gnd to Gnd […]

Wemos Mini and the BMP180 shield

Similar to the last post on the DS18b20 shield this was another shield that did not appear on the Wemos site, this time it was for the BMP180 sensor

Here is a picture of the shield BMP180 Digital Barometric Pressure Sensor Board Digital Barometric Pressure Sensor Module For D1 MINI

As stated the shield is not […]

Wemos Mini compatible Ds18B20 shield

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I already have a Ds18B20 example on this site but i was interested to see that searching through popular electronic component sites a DS18B20 shield for the Wemos mini, I couldn’t find a link on the Wemos site so I was intrigued and purchased one, I had planned on […]

Wemos Mini and a PCF8574

The PCF8574 is an 8 bits I/O port expander that uses the I2C protocol. Using this IC, you can use only the SDA and SCL pins of your Arduino board to control up to 8 digital I/O ports.

A0,A1,A2 are address pins P0,P1,P2,P3,P4,P5,P6,P7 are digital I/O ports SDA,SCL are the I2C pins

If we […]