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Merge branch 'main' of https://github.com/Sensirion/arduino-snippets into main
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‎README.md

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@@ -21,3 +21,66 @@ All samples in this directory share the same format; as such, you can follow the
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1. Save your project under a meaningful name
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1. Compile and flash the sketch
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1. Open the "Serial Monitor" from the "Tools" menu in the Arduino IDE to display the output data read from the sensor
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# Examples by sensor
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## SCD4x
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|Name|Protocol|Description|
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|----|--------|-----------|
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|[SCD4x_I2C_minimal_example](/SCD4x_I2C_minimal_example)|I2C|Minimal example to get started|
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|[SCD4x_I2C_FRC_Forced_Recalibration_Example](SCD4x_I2C_FRC_Forced_Recalibration_Example)|I2C|Show forced recalibration|
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## SEN44
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|Name|Protocol|Description|
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|----|--------|-----------|
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|[SEN44_I2C_minimal_example](/SEN44_I2C_minimal_example)|I2C|Basic example for I2C|
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|[SEN44_I2C_pm_values_floating_point](/SEN44_I2C_pm_values_floating_point)|I2C|Read out PM values as floating point|
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|[SEN44_I2C_change_T_offset_example](/SEN44_I2C_change_T_offset_example)|I2C|Change T offset over I2C|
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|[SEN44_I2C_change_VOC_parameters_example](/SEN44_I2C_change_VOC_parameters_example)|I2C|Change VOC parameters over I2C|
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|[SEN44_SCD40_I2C_example](/SEN44_SCD40_I2C_example)|I2C|Example using SEN44 with SCD4x|
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|[SEN44_UART_minimal_example](/SEN44_UART_minimal_example)|UART|Basic example for UART (Serial) interface|
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## SFA30
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|Name|Protocol|Description|
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|----|--------|-----------|
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|[SFA30_I2C_minimal_example](/SFA30_I2C_minimal_example)|I2C|Minimal example to get started|
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## SGP40
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|Name|Protocol|Description|
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|----|--------|-----------|
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|[SGP40_SHTC3_I2C_voc_algo_minimal_example](/SGP40_SHTC3_I2C_voc_algo_minimal_example)|I2C|Minimal example to use SGP40 with VOC Index algorithm|
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## SHT3x
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|Name|Protocol|Description|
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|----|--------|-----------|
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|[SHT3x_I2C_minimal_example](/SHT3x_I2C_minimal_example)|I2C|Minimal example to get started|
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## SHT4x
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|Name|Protocol|Description|
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|----|--------|-----------|
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|[SHT4x_I2C_minimal_example](/SHT4x_I2C_minimal_example)|I2C|Minimal example to get started|
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## SHTC3
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|Name|Protocol|Description|
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|----|--------|-----------|
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|[SHTC3_I2C_minimal_example](/SHTC3_I2C_minimal_example)|I2C|Minimal example to get started|
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## SVM40
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|Name|Protocol|Description|
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|----|--------|-----------|
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|[SVM40_I2C_minimal_example](/SVM40_I2C_minimal_example)|I2C|Minimal example to get started|
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|[SVM40_I2C_change_T_offset_example](/SVM40_I2C_change_T_offset_example)|I2C|Change T offset|
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|[SVM40_I2C_change_VOC_parameters_example](/SVM40_I2C_change_VOC_parameters_example)|I2C|Change VOC index algorithm parameters|
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## SDP8xx
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|Name|Protocol|Description|
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|----|--------|-----------|
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|[SDP8xx_I2C_minimal_example](/SDP8xx_I2C_minimal_example)|I2C|Minimal example to get started|
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‎SFM3x00_I2C_minimal_example/README.md

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# SFM3x00 Minimal Example
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## Configuration
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Please note that the model selection is done manually, line 55 of [SFM3x00_minimal_example.ino](SFM3x00_minimal_example.ino#55)
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```c++
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54: // ACTION: select your component here from the enum above:
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55: const uint8_t MODEL = SFM3200;
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```
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The available sensors can be found on line 36 of [SFM3x00_minimal_example.ino](SFM3x00_minimal_example.ino#36)
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```c++
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35: // supported sensors
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36: enum SFM_MODEL {
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37: SFM3000 = 0,
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38: SFM3200,
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39: SFM3300,
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40: SFM3400,
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41: SFM_MODEL_LENGTH //< Note: this is not a valid value for 'MODEL' below
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42: };
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```

‎SFM3x00_I2C_minimal_example/SFM3x00_minimal_example.ino

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/*
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* Copyright (c) 2021, Sensirion AG
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* * Neither the name of Sensirion AG nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <Wire.h>
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// supported sensors
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enum SFM_MODEL {
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SFM3000 = 0,
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SFM3200,
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SFM3300,
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SFM3400,
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SFM_MODEL_LENGTH //< Note: this is not a valid value for 'MODEL' below
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};
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// from the datasheets:
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const int16_t SFM3X00_ADDRESS = 0x40;
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const int16_t FLOW_OFFSET[SFM_MODEL_LENGTH] = { 32000, 32768, 32768, 32768 };
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const int16_t SCALE_FACTOR_AIR[SFM_MODEL_LENGTH] = { 140, 140, 120, 800 };
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const byte CMD_START_MEASUREMENT[] = { 0x10, 0x00 };
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const byte CMD_SOFT_RESET[] = { 0x20, 0x00 };
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// ACTION: select your component here from the enum above:
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const uint8_t MODEL = SFM3200;
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void setup()
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{
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Serial.begin(115200);
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while(!Serial);
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Wire.begin();
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/*
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// optional reset before use
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Wire.beginTransmission(SFM3X00_ADDRESS);
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Wire.write(CMD_SOFT_RESET, 2);
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Wire.endTransmission();
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delay(100);
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*/
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Wire.beginTransmission(SFM3X00_ADDRESS);
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Wire.write(CMD_START_MEASUREMENT, 2);
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Wire.endTransmission();
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delay(100);
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Serial.println("Flow rate [slm]");
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}
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void loop()
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{
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Wire.requestFrom(SFM3X00_ADDRESS, 3);
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if (Wire.available() < 3) {
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Serial.println("No data received from sensor");
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} else {
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int16_t flow;
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flow = (int16_t)Wire.read() << 8;
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flow |= Wire.read();
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// CRC verification (third byte) left as an exercise for the reader
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flow = (flow - FLOW_OFFSET[MODEL]) / SCALE_FACTOR_AIR[MODEL];
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Serial.println(flow);
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}
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delay(100);
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}

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