https://github.com/gtalusan/nrf52-ds18b20

arduino arduino-sketch ble bluetooth bluetooth-le bluetooth-low-energy ds18b20 nrf52 nrf52832 nrf5x onewire redbearlab redbearlabs temperature-sensor

Last synced: 2 months ago
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nRF52 DS18B20 arduino example

Host: GitHub
URL: https://github.com/gtalusan/nrf52-ds18b20
Owner: gtalusan
Created: 2017-09-17T03:35:03.000Z (almost 8 years ago)
Default Branch: master
Last Pushed: 2017-10-06T02:16:44.000Z (over 7 years ago)
Last Synced: 2025-03-29T07:22:24.645Z (3 months ago)
Topics: arduino, arduino-sketch, ble, bluetooth, bluetooth-le, bluetooth-low-energy, ds18b20, nrf52, nrf52832, nrf5x, onewire, redbearlab, redbearlabs, temperature-sensor
Language: Arduino
Size: 1.26 MB
Stars: 7
Watchers: 2
Forks: 1
Open Issues: 0
Metadata Files:
- Readme: README.md

README

# nRF5x DS18B20 example

![alt text](./redbear-ds18b20.jpg "DS18B20 with Redbear BLE Nano v2")

### Description

Short example broadcasting a DS18B20 temperature sensor over Bluetooth LE

### Electrical

DS18B20 wired in parasitic mode. 3.3V -> 2.2kΩ resistor -> DQ, DQ -> D4 (nRF). VCC shorted to GND.

### Current consumption

Typical with no calls into mbed SDK is about 8mA.

Turning on DCDC in loop brings it down to 3.5mA.

Calling sd_app_evt_wait brings it down to 0.36mA on system boot.

Back to 3.5mA once a central connects. Force a system reset when a central disconnects brings it back down to 0.36mA.