https://github.com/sensirion/makecode-extension-svm40
Makecode extension for SVM40 Evaluation Kit
https://github.com/sensirion/makecode-extension-svm40
calliope calliope-mini humidity makecode-extension microbit sensirion svm40 temperature voc
Last synced: 4 months ago
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Makecode extension for SVM40 Evaluation Kit
- Host: GitHub
- URL: https://github.com/sensirion/makecode-extension-svm40
- Owner: Sensirion
- License: mit
- Created: 2021-03-12T13:30:57.000Z (almost 5 years ago)
- Default Branch: master
- Last Pushed: 2021-03-12T14:02:57.000Z (almost 5 years ago)
- Last Synced: 2025-01-10T19:31:57.337Z (about 1 year ago)
- Topics: calliope, calliope-mini, humidity, makecode-extension, microbit, sensirion, svm40, temperature, voc
- Language: TypeScript
- Homepage:
- Size: 764 KB
- Stars: 0
- Watchers: 6
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Sensirion SVM40 Makecode Extension
Makecode extension for the Sensirion SVM40 evaluation kit connected to the micro:bit platform.
This extension allows you to read VOC (Volatile Organic Components), temperature and relative humidity values with an interval of 1 second.
## SVM40 Evaluation Kit
[
](https://www.sensirion.com/my-sgp-ek/)
* Additional information:
[SVM40 Product Homepage](https://www.sensirion.com/en/environmental-sensors/evaluation-kit-sek-environmental-sensing/evaluation-kit-sek-svm40/)
* Where to Buy: [Buy SVM40 Evaluation Kit](https://www.sensirion.com/index.php?id=1161&L=5&url=%22https://dilp.netcomponents.com/cgi-bin/sensirion.asp?lang=de&Region=NA&mode=2&partnumber1=SVM40&pq=Suchen%22)
## Supported Targets
* PXT/microbit
* Calliope mini
## I2C Address
* 0x6A
## Usage
open your microbit makecode project, in "+ Extension", paste the following URL:
https://github.com/Sensirion/makecode-extension-svm40
### Connecting the Sensor
If you don't have a suitable cable at hand, please find the SEK-SVM40 pinout listed below, or in
the [technical documentation](https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/9_Gas_Sensors/Sensirion_Gas_Sensors_SEK-SVM40_Technical_Description_D1.pdf):
| *Pin* | *Cable Color* | *Name* | *Description* | *Comments* |
|-------|---------------|--------|---------------|------------|
| 1 | Red | VDD | Supply Voltage | 3.3 or 5.0 V
| 2 | Black | Ground |
| 3 | Green | SDA | I2C: Serial data, bidirectional |
| 4 | Yellow | SCL | I2C: Serial clock |
| 5 | Blue | SEL | Interface select | Pull to GND to select I2C
| | | | | Leave floating or pull to VDD to select UART
| 6 | Purple | NC | Do not connect |
## Demo
## API
Get VOC value in ppb (parts per billion)
```ts
function get_voc()
```
Get temperature in degree celsius. Takes an optional argument to change to fahrenheit.
```ts
function get_temperature()
```
Get relative humidity in percent
```ts
function get_relative_humidity()
```
Start measurement on SVM40 evaluation kit. This method will be automatically called on initialization.
If you call `stop_continuous_measurement()` you have to call this method again before voc, temperature and humidity
values can be retrieved again.
```ts
function start_continuous_measurement()
```
Stop measurement on SVM40 evaluation kit. After calling this function, no more sensor values can be read out
anymore until you call `start_continuous_measurement`
```ts
function stop_continuous_measurement()
```
## License
[MIT](LICENSE)
Copyright (c) 2021, Sensirion AG