From 75d8b5ea49898ed4f446dcbf14edd5b37b20daa3 Mon Sep 17 00:00:00 2001 From: Chris Date: Sat, 25 Mar 2023 12:18:25 +1300 Subject: [PATCH 1/2] Update README.md --- README.md | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 885ec9a..116f567 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,6 @@ # SCD4x Library -This is a library to interface with the Sensirion SCD4x in Arduino using the I2C protocol. +This is a library to interface with the Sensirion SCD4x true CO2 sensors in Arduino using the I2C protocol. ## Features - use multiple I2C Busses -> scd4x.begin(Wire1); @@ -39,6 +39,10 @@ vTaskDelay(4750 / portTICK_PERIOD_MS); ## 🖼️ Schematic ![Schematic](/images/schematic.png) +- the scd4x sensor can draw up to 205ma peaks at 3.3V (only 18ma average) so make sure you have a robust power source (the above schematic has been tested to work) +- you only need to solder the 6 pins shown and the thermal pad on the underside to get it working +- unfortunately I have not found a way to easily solder these sensors with a soldering iron, a oven or hotplate seems to be the only way +- look out for a temperature offset if you place the sensor in a case of sorts # License From 2f83908fdca32ff075d56b85effacb2d72290670 Mon Sep 17 00:00:00 2001 From: Chris Date: Sun, 26 Mar 2023 18:53:34 +1300 Subject: [PATCH 2/2] Update README.md --- README.md | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/README.md b/README.md index 116f567..75a571c 100644 --- a/README.md +++ b/README.md @@ -10,7 +10,7 @@ This is a library to interface with the Sensirion SCD4x true CO2 sensors in Ardu ## Warnings - not all functions are implemented -- not compatible with other SCD4x arduino libraries +- not compatible with other SCD4x Arduino libraries - only tested with the esp32 - under active development @@ -41,9 +41,12 @@ vTaskDelay(4750 / portTICK_PERIOD_MS); ![Schematic](/images/schematic.png) - the scd4x sensor can draw up to 205ma peaks at 3.3V (only 18ma average) so make sure you have a robust power source (the above schematic has been tested to work) - you only need to solder the 6 pins shown and the thermal pad on the underside to get it working -- unfortunately I have not found a way to easily solder these sensors with a soldering iron, a oven or hotplate seems to be the only way +- unfortunately, I have not found a way to easily solder these sensors with a soldering iron, a oven or hotplate seems to be the only way - look out for a temperature offset if you place the sensor in a case of sorts -# License +## Based on the awesome work of Raphael Nestler and everyone at Sensirion AG +Origin created by Raphael Nestler in 2021 +https://github.com/Sensirion/arduino-i2c-scd4x -See [LICENSE](LICENSE). + +To help support my work check out my store: https://keastudios.co.nz/