DS18S20 — Pilight 8.1.5 Documentation

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2. Protocols
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4. DS18S20

DS18S20¶

Feature	Support
Sending
Receiving
Config

Supported Brands

Brand	Protocol
1-Wire DS18B20	ds18b20
1-Wire DS18S20	ds18s20

Sender Arguments

None

Config

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

{ "devices": { "weather": { "protocol": [ "ds18b20" ], "id": [{ "id": "0000052ba3ac" }], "temperature": 19.562 } }, "gui": { "temperature": { "name": "Temperature Sensor", "group": [ "Misc" ], "media": [ "all" ] } } }

Option	Value
id	valid 1-wire id
temperature	-55 - 125

Note

DS18B20

Valid id’s can be found in the path /sys/bus/w1/devices/ starting with 28-. The prefix 28- should be removed from the id.

Note

DS18S20

Valid id’s can be found in the path /sys/bus/w1/devices/ starting with 10-. The prefix 10- should be removed from the id.

Optional Settings

Device Settings

Setting	Default	Format	Description
poll-interval	5	seconds	What should be the poll interval of the sensors
temperature-offset	0	number	Correct temperature value

GUI Settings

Note

DS18B20

Setting	Default	Format	Description
temperature-decimals	2	number	How many decimals the GUIs should display for temperature
show-temperature	1	1 or 0	Don’t display the temperature value

Note

DS18S20

Setting	Default	Format	Description
temperature-decimals	3	number	How many decimals the GUIs should display for temperature
show-temperature	1	1 or 0	Don’t display the temperature value

Comments

Before pilight can see the sensor, you have to run the following commands:

sudo modprobe w1-gpio sudo modprobe w1-therm

To make sure this is done every reboot, edit /etc/modules and add the following lines:

w1-gpio w1-therm

If you have enabled “Device tree support” (since Raspbian with kernel 3.18 it’s the default configuration), you have to add the following line to /boot/config.txt:

dtoverlay=w1-gpio-pullup,gpiopin=4

Note

The GPIO pin number is the BCM GPIO and not the WiringX number.

This will load the module w1-gpio, so you only have to add w1-therm to your /etc/modules.

To find the correct sensor id, you have to run the following commands:

cd /sys/bus/w1/devices ls

The result will look like:

28-0000055bd776 w1_bus_master1

Use the part after 28- as the correct id, e.g. 0000055bd776.

DS18B20 GPIO Switch

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