5 DS18x20

Michael Ingraham edited this page 2019-11-19 10:40:53 -05:00

Table of Contents

• Configuration
• Wiring
• Tasmota
• Commands
• Multiple Sensors
• Sensor Versions

DS18x20 driver supports DS18B20, DS18S20 and DS1822 1-Wire digital temperature sensors.

Configuration

Wiring

DS18b20	ESP266
1 GND	GND
2 Data	GPIOx
3 VCC	3.3v

You need to connect a 4.7K pullup resistor from data to 3.3V.

Tasmota

In the Configuration -> Configure Module page assign:

• GPIOx to DS18x20 (4)

After a reboot webUI will display temperature measured.

Sensor sends a tele/%topic%/SENSOR JSON reponse:

{"Time":"2019-01-01T00:00:00","DS18B20":{"Temperature":49.7},"TempUnit":"C"}

Commands

SetOption74 is used to enable/disable internal pullup for single DS18x20 sensor.

TempOffset can be used for calibrating the measured temperature. This setting affects all temperature sensors on the device.

Multiple Sensors

Tasmota supports multiple DS18b20 sensors connected to a single ESP8266 chip.

Every sensors will get a unique ID used in webUI and MQTT telemetry.

Sensor Versions

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