Table of Contents
LamaPLC: Humidity / temperature / air-press / gas / air-quality sensors and moduls for Arduino
The following tables contain a list of Arduino compatible sensors. The first table lists the sensors in ABC order, together with their technical characteristics.
The second table (modules) contains a list of Arduino compatible sensor modules. In many cases, the voltage level of the sensors is not the same as that of the Arduino (3.3V or 5V). Among other things, the listed modules improve this shortcoming.
| Type of measurement | Model | Power voltage | Measurement, range, accuracy | Communication | Note |
|---|---|---|---|---|---|
 Airflow Sensor Nebulizer Air Switch | Unidro 6025/6027  | 3.3V (2.5 .. 4.5V) | Output voltage: 3.7V | Analog | Load current: 5mA Response time: 46ms |
  Temperature Humidity | Adafruit AM2315C  | 3.3 / 5 V (2.2 .. 5.5V) | Temperature measurement range: -40 .. +80 °C Temperature measurement accuracy: ±0.3°C Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±2% | I²C | Measure: 3.2 mW Reaction time: 8s |
 Temperature Air-pressure | Bosch BMP180  | 3.3 V (1.62 .. 3.6V) | Temperature measurement range: -40 .. +85 °C Temperature measurement accuracy: ±1.5°C Air pressure Range: 4.35PSI .. 15.95PSI (30kPa .. 110kPa) Air pressure accuracy: ±2% | I²C default addr.: 0x77 (fix) | Maximum Pressure: 145.04PSI (1000kPa) Temperature resolution: 0.1 °C Pressure resolution: 1 Pa |
| Temperature Humidity Air pressure | Bosch BME280  | 3.3 V (1.71 .. 3.6V) | Temperature measurement range: -40 .. +80 °C Temperature measurement accuracy: ±0.5°C (-40..85) Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±3% Air pressure Range: 300 .. 1100 hPa Air pressure accuracy: ±0.25% | I²C default addr.: 0x76/77 SPI | - |
| Temperature Humidity Air pressure | Bosch BME680  | 3.3 V (1.71 .. 3.6V) | Temperature measurement range: -40 .. +80 °C Temperature measurement accuracy: ±1.5°C Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±3% Air pressure Range: 300 .. 1100 hPa Air pressure accuracy: ±0.25% | I²C default addr.: 0x76/77 SPI | Direct output of IAQ: Index for Air Quality |
| Temperature Air-pressure | Bosch BMP280  | 3.3 V (1.71 .. 3.6V) | Temperature measurement range: -40 .. +85 °C Temperature measurement accuracy: ±1.5°C Air pressure Range: 4.35PSI .. 15.95PSI (30kPa .. 110kPa) Air pressure accuracy: ±2% | I²C default addr.: 0x76 SPI | Maximum Pressure: 290.08PSI (2000kPa) Temperature resolution: 0.01 °C Pressure resolution: 0.16 Pa |
| CO2 VOC | Sciosense CCS811  | 3.3V (1.8 .. 3.6V) | equivalent CO2 (eCO2): 400 ppm .. 32768 ppm equivalent Total Volatile Organic Compound (eTVOC): 0 ppb .. 29206 ppb. | I²C default address: 0x5A / 0x5B | Standard (100kbit/s) and fast (400kbit/s) I²C interface Power Consumption maximum: 46 mW |
Non-Contact Thermal Sensor | Omron D6T-32L  | 5V | Number of elements: 1024 (32 × 32) Current consumption: 19 mA Object temperature detection: D6T-32L-01A: 0 to 200°C | I²C | Response time: 200 msec Arduino lib |
Non-Contact Thermal Sensor | Omron D6T-44L  | 5V | Number of elements: 16 (4 × 4) Current consumption: 5 mA Object temperature detection: D6T-44L-06: 5 .. 50°C D6T-44L-06H: 5 .. 200°C | I²C | Response time: 300 msec Arduino lib |
Non-Contact Thermal Sensor | Omron D6T-8L  | 5V | Number of elements: 8 (1 × 8) Current consumption: 5 mA Object temperature detection: D6T-8L-09: 5 .. 50°C D6T-8L-09H: 5 .. 200°C | I²C | Response time: 250 msec Arduino lib |
Non-Contact Thermal Sensor | Omron D6T-1A  | 5V | Number of elements: 1 (1 × 1) Current consumption: 3.5 mA Object temperature detection: D6T-1A-01: 5 .. 50°C D6T-1A-02: -40 .. 80°C | I²C | Response time: 100 msec Arduino lib |
| Temperature Humidity | DHT11  | 3.3 / 5 V (3.3 .. 5.5V) | Temperature measurement range: 0 .. +50 °C Temperature measurement accuracy: ±2°C Humidity measurement range: 20..90% RH Humidity measurement accuracy: ±5% | 1-Wire | 8 bit resolution, response time 10 sec |
| Temperature Humidity | DHT20  | 3.3 / 5 V (2.2 .. 5.5V) | Temperature measurement range: -40 .. +80 °C Temperature measurement accuracy: ±0.5°C (-40..80) Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±3% | I²C default addr.: 0x38 | - |
| Temperature Humidity | DHT22 AM2302  | 3.3 / 5 V (2.2 .. 5.5V) | Temperature measurement range: -40 .. +80 °C Temperature measurement accuracy: ±0.5°C (-40..80) Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±2% | single-bus | - |
Barometric Pressure Sensor | Infineon DPS310  | 3.3V | Supply voltage: VDDIO: 1.2 .. 3.6 V Operation range: Pressure: 300 .. 1200 hPa. Temperature: -40 – 85 °C Pressure sensor precision: ± 0.002 hPa (or ±0.02 m) (high precision mode) Relative accuracy: ± 0.06 hPa (or ±0.5 m) Absolute accuracy: ± 1 hPa (or ±8 m) Temperature accuracy: ± 0.5°C Pressure temperature sensitivity: 0.5Pa/K | I²C or SPI I2C default address: 0x76 (SDO←GND) or 0x77 (SDO←VDDIO) | Measurement time: Typical: 27.6 ms |
| Temperature | Dallas DS18B20  | 3.3 / 5 V (3.3 .. 5.5V) | Temperature measurement range: -55 .. +125 °C Temperature measurement accuracy: ±0.5°C | 1-Wire | 9 to 12 bit (selectable) resolution Conversion Time < 750ms Current Consumption: 1mA |
| NO² | MEMS GM-102b  | 5V | Detection Range: 0.1~10ppm (NO²) Heater Resistance: 80Ω±20Ω（room temperature | analog signal | - |
| alcohol gas | MEMS GM-302b | 5V | Detection Range: 1..500ppm (Ethanol vapor) 80Ω±20Ω（room temperature | analog signal | - |
| Alcohol (C2H5OH) Hydrogen(H2) Formaldehyde(CH2O) | MEMS GM-502b | 5V | Detection: Alcohol (C2H5OH), 10..500ppm Detection: Hydrogen(H2), 1..1000ppm Detection: Formaldehyde(CH2O), 10..100ppm | analog signal | - |
| Carbon monoxide (CO) Hydrogen (H2) | MEMS GM-702b | 5V | Detection: Carbon monoxide sensor (CO) : 10..5000ppm Hydrogen sensor (H2): 10..500ppm | analog signal | - |
| TVOC eCO2 | ScioSense ENS-160  | 3.3V | Detection: TVOC: 0..65000ppm eCO2: 400..65000ppm AQI-UBA1: 1..5 (Classified TVOC output signal) | I²C default addr.: 0x40 | - |
| Temperature Humidity | Texas Instruments HDC 1080  | 3.3 - 5 V (2.7 .. 5.5V) | Temperature measurement range: -40 .. +125 °C Temperature measurement accuracy: ±0.2°C Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±2% | I²C default addr.: 0x40 | 14 Bit Measurement Resolution 100 nA Sleep Mode Current |
| Temperature Humidity | TE Connectivity HTU21  | 3.3V (1.5 .. 3.6V) | Temperature measurement range: -40 .. +125 °C Temperature measurement accuracy: ±0.3°C Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±2% | I²C default addr.: 0x40 (fix) | Power Dissipation: 2.7 µW Resolution: 12 / 8 bit Measuring Time: 3..16 ms |
| Carbon monoxide (CO) Methane (CH4) Ethanol (C2H5OH) Propane (C3H8) Butane (C4H10) Hydrogen (H2) Hydrogen sulfide (H2S) Ammonia (NH3) | Fermion MICS-5524 V1.0  | 5V | The module is intended for educational and hobby purposes! Measuring range: 1 .. 1000 ppm (carbon monoxide CO) 10 .. 500ppm (Ethanol C2H5OH) 1 .. 1000ppm (Hydrogen H2) 1 .. 500 ppm (NH3 ammonia) > 1000 ppm (methane CH4) | analog signal | - |
Smoke gas Combustible gas | Winsen MQ-2  | 5V | Flammable gas concentracion: 300 .. 10'000ppm Heater Resistance; RH: 29Ω ±3Ω（room tem.） Heater consumption; PH: ≤950mW Sensitivity;S: Ro(in air) / Rs (2000 ppm C3H8) ≥ 5 Output Voltage;Vs: 2.5V～4.0V（in 2000 ppm C3H8） Concentration Slope;α: ≤0.6 (R3000 ppm / R1000 ppm C3H8) | analog signal | Lifespan: 10 years Preheat time: Over 24 hour |
Alcohol gas Small sensitivy: Benzine gas | Winsen MQ-3  | 5V | Detecting concentration scope：0.05 mg / 10 mg/L Alcohol Sensing Resistance: 1 MΩ - 8 MΩ (0.4 mg/L alcohol) | analog signal | Preheat time: Over 24 hour |
CH4 gas Natural gas LNG Small sensitivy: Alcohol Smoke | Winsen MQ-4  | 5V | Detecting concentration scope：200-10'000ppm CH4, natural gas Sensing Resistance: 10KΩ- 60KΩ (1000ppm CH4) | analog signal | Preheat time: Over 24 hour |
LPG Iso-butane Propane Small sensitivy: Alcohol Smoke | Winsen MQ-5  | 5V | Detecting concentration scope：200-10'000ppm LPG,LNG, Natural gas, Iso-butane, Propane, Town gas Sensing Resistance: 10KΩ- 60KΩ (5000 ppm methane) | analog signal | Preheat time: Over 24 hour |
Town gas Natural gas LPG LNG Iso-butane Propane Small sensitivy: Alcohol Smoke | Winsen MQ-6  | 5V | Detecting concentration scope：200-10'000ppm LPG ,iso-butane, propane, LNG Sensing Resistance: 10KΩ- 60KΩ (10'00ppm LPG) | analog signal | Preheat time: Over 24 hour |
CO | Winsen MQ-7  | 5V | Detecting concentration scope：over 300 ppm CO (Carbon Monoxide) Sensing Resistance: 2KΩ- 20KΩ (100 ppm CO) | analog signal | Preheat time: Over 48 hour |
H2 Small sensitivy: Alcohol LPG cooking fumes | Winsen MQ-8  | 5V | Detecting concentration scope：100-10000ppm Hydrogen (H2) Sensing Resistance: 10KΩ- 60KΩ (1000 ppm H2) | analog signal | Preheat time: Over 24 hour |
CO CH4 gas LPG | Winsen MQ-9  | 5V | Detecting range： 20 ppm .. 2000 ppm carbon monoxide 500 ppm .. 10'000 ppm CH4 500 ppm .. 10'000 ppm LPG Sensing Resistance: 2KΩ- 20KΩ (100 ppm CH4) | analog signal | Preheat time: Over 48 hour |
NOx NH3 alcohol Benzene smoke CO2 | Winsen MQ-135  | 5V | Detecting range： 10 ppm .. 300 ppm NH3 10 ppm .. 1000 ppm Benzene 10 ppm .. 300 ppm Alcohol Sensing Resistance: 30KΩ- 200KΩ (100 ppm NH3) | analog signal | Preheat time: Over 24 hour |
Oxigen | AlphaSense O2-A2  | 5V | Range of oxygen sensor: 0..30 % Load resistance: 47-100 Ω | analog signal | - |
CO2 humidity temperature | SCD-30  | 3.3V / 5V | Humidity range: 0 .. 100 %RH Temperature range: -40°C .. 70°C CO² range: 0 .. 40’000 ppm (I²C, UART), 0 .. 5’000 ppm (PWM) | UART (Modbus Point to Point; TTL Logic), PWM and I²C | Response time: 20s Sensor lifetime: 15 years |
| CO2 Air-quality Temperature Humidity | Sensirion SCD40-D-R2  | 3.3V / 5V (2.4 .. 5.5V) | CO2 output range: 0 .. 40'000 ppm CO2 measurement accuracy: ± 40 ppm Humidity measurement range: 0 %RH .. 100 %RH Humidity measurement accuracy: ±6 %RH Temperature measurement range: 10°C .. 60°C Temperature measurement accuracy: ±1.5 °C | I²C default address: 0x62 | SCL clock frequency: 100 kHz |
VOC - CO2-eq Sensor | Sensirion SGP30  | 1.8V | Supply voltage 1.62 .. 1.98 V Measurement range (CO₂-eq): 0 .. 1000 ppm Specified range: Ethanol signal: 0.3 ppm .. 30 ppm H2 signal 0.5 ppm .. 3 ppm | I²C I2C default address: 0x58 | Sampling frequency: Max. 40 Hz Data sheet |
Indoor Air Quality Sensor for VOC Measurements | Sensirion SGP40  | 3.3V | Supply voltage 1.7 .. 3.6 V Ethanol in clean air: 0 .. 1000 ppm | I²C I2C default address: 0x59 | Sampling frequency: Max. 40 Hz Data sheet |
Air Quality Sensor for VOC and NOx Measurements | Sensirion SGP41  | 3.3V | Supply voltage 1.7 .. 3.6 V Ethanol in clean air: 0 .. 1.000.000 ppm NO2 in clean air: 0 .. 10.000 ppm | I²C I2C default address: 0x59 | Sampling frequency: Max. 40 Hz Data sheet |
| Temperature Humidity | Sensirion SHT20  | 3.3V (2.1 .. 3.6V) | Temperature measurement range: -40 .. +125 °C Temperature measurement accuracy: ±0.3°C Humidity measurement range: 0..100% RH Humidity measurement accuracy:±3% | I²C default addr.: 0x40/41 | 3.2 µW (at 8 bits, 1 measurement /s) |
| Temperature Humidity | Sensirion SHT21  | 3.3V (2.1 .. 3.6V) | Temperature measurement range: -40 .. +125 °C Temperature measurement accuracy: ±0.3°C Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±2% | I²C default addr.: 0x40/41 | 3.2 µW (at 8 bits, 1 measurement /s) |
| Temperature Humidity | Sensirion SHT25  | 3.3V (2.1 .. 3.6V) | Temperature measurement range: -40 .. +125 °C Temperature measurement accuracy: ±0.2°C Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±1.8% | I²C default addr.: 0x40/41 | 3.2 µW (at 8 bits, 1 measurement /s) |
| Temperature Humidity | Sensirion SHT30  | 3.3 / 5 V (2.15 .. 5.5V) | Temperature measurement range: -40 .. +125 °C Temperature measurement accuracy: ±0.2°C Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±2% (10..90%) | I²C default addr.: 0x44/45 | 4.8 µW (1 measurement/s) |
| Temperature Humidity | Sensirion SHT31 | 3.3 / 5 V (2.15 .. 5.5V) | Temperature measurement range: -40 .. +125 °C Temperature measurement accuracy: ±0.2°C Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±2% (0..100%) | I²C default addr.: 0x44/45 | 4.8 µW (1 measurement/s) |
| Temperature Humidity | Sensirion SHT35 | 3.3 / 5 V (2.15 .. 5.5V) | Temperature measurement range: -40 .. +125 °C Temperature measurement accuracy: ±0.2°C Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±1.5% (0..80%) | I²C default addr.: 0x44/45 | 4.8 µW (1 measurement/s) |
| Temperature Humidity | Sensirion SHT40  | 3.3 (1.08 .. 3.6V) | Temperature measurement range: -40 .. +125 °C Temperature measurement accuracy: ±0.2°C Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±1.8% | I²C default addr.: 0x44/45 | 4.0 µW (1 measurement/s) |
| Temperature Humidity | Siliconlabs Si-7021  | 3.3V (1.9 .. 3.6V) | Temperature measurement range: -40 .. +125 °C Temperature measurement accuracy: ±0.3°C Humidity measurement range: 0..100% RH Humidity measurement accuracy: ±2% | I²C default addr.: 0x40 | - |
| Temperature | Microchip TC1047A  | 5 / 3.3V (2.5 .. 5.5V) | Temperature measurement range: -40 .. +125 °C Temperature measurement accuracy: ±0.5°C | analog 10mV/°C | Maximum Supply Current 60uA |
Methane Natural gas | GL Sciences TGS-2611  | 5V | Sensor resistance in 5000ppm of methaneat 20°C and 65% R.H. Sensor resistance: 0.68 .. 6.8 kΩ in 5000 ppm methane | analog signal | Conditioning period before test: 7 days |
Arduino compatible sensor modules
Humidity / Temperature Arduino moduls
The temperature / humidity sensor modules contain the additional technology required for sensor ICs (voltage regulation, pull-up resistors,…) and the connection pins simplify the connection of the sensors to, for example, Arduinos. The modules are typically universal and can be used for several sensors, so it's worth paying attention to which sensor is installed on the module, mainly because of the power supply (almost all sensors work with 3.3V, but not all of them work with 5V). There are often bridges used for addressing on the modules, which can be soldered in and out, and for example I²C addresses can be set with them.
Gas sensor Arduino moduls
The gas sensor modules contain the additional technology required for sensor ICs (voltage regulation, pull-up resistors,…) and the connection pins simplify the connection of the sensors to, for example, Arduinos. The modules are typically universal and can be used for several sensors, so it's worth paying attention to which sensor is installed on the module, mainly because of the power supply (almost all sensors work with 3.3V, but not all of them work with 5V). There are often bridges used for addressing on the modules, which can be soldered in and out, and for example I²C addresses can be set with them.
| Type of measurement | Name | Pics | Sensors | Description |
|---|---|---|---|---|
| CO2 TVOC | CJMCU-811 |  | CCS811 | I²C interface, address: ADDR pin low: 0x5A, ADD pin high: 0x5B VCC: normally 3.3V GND: GND SCL: Serial Clock Line, interface to I2C SDA: Serial Data Address, interface to I2C WAK: Wake (active low, not connected) INT: Interrupt (active low, not connected) RST: Reset (active low, not connected) ADD: 10k pull-down to GND, setting the I2C address to 0x5A Arduino library: ✔ |
| - Barometric Pressure Sensor | Pressure Shield2Go |  | DPS310 | I²C or SPI I2C default address: 0x76 (SDO←GND) or 0x77 (SDO←VDDIO) ✔ Arduino library |
| CO H2 Alcohol (C2H5OH) Hydrogen(H2) Formaldehyde(CH2O) Alcohol gas NO² | GRV GAS SENS V2 |  | All 4 sensors in one platform: GM-102b (NO²) GM-302b (alcohol gas) GM-502b (Alcohol (C2H5OH), Hydrogen(H2), Formaldehyde(CH2O)) GM-702b (Carbon monoxide (CO), Hydrogen (H2)) | I²C interface, default address:0x55 VCC: normally 5V GND: GND SCL: Serial Clock Line, interface to I2C SDA: Serial Data Address, interface to I2C Arduino library: ✔ |
| - Temperature - Humidity | GY-21 |  | HTU21 Si-7021 SHT21 | I²C interface (only 1 modul, default address: 0x40) GY-21 is a reliable and durable module for detecting temperature and humidity values compatible with Arduino, Atmega328p, ESP and Raspberry Typical measurement accuracy temperature: +/-1°C deviation between -30°C and 90°C Typical measurement accuracy humidity: +/-2% RL between 5% and 95% RL |
| - Temperature - Air-press | GY-68 |  | BMP180 | - I²C interface (only 1 modul) - The I²C address on the BMP180 is 0x77. And it is fixed, making it impossible to add multiple sensors to the same I²C bus. - Compatible with Arduino, Atmega328p, ESP and Raspberry |
| - Temperature - Humidity - Air press | GY-BME280 |  | BME280 | - I²C interface (max. 2 moduls) - The module's default I2C address is 0x76, which can be easily changed to 0x77 using the provided solder jumper.* - Compatible with Arduino, Atmega328p, ESP and Raspberry *: To change the i2c address to 0x77, cut the trace between the middle and left copper pads with a sharp knife. Then, add a solder blob between the middle and right copper pads to short them. |
| - Temperature - Air press | GY-BMP280-3.3 |  | BMP280 | - Or I²C interface (max. 2 moduls; up to 3.4 MHz) - Or SPI interface (up to 10 MHz) - Current consumption of sensor BMP280: 2.7µA @ 1 Hz sampling rate - The Chip Select (CSB) and Serial Data Output (SDO) pins of the BMP280 are necessary only when SPI-based (four-wire) communication is applied. I²C is a two wire interface SDA SCK. - Default I²C is: 0x76 (SDO pin low) - To I²C 0x77 address connect pin 6 of the module (SDO) to Vcc which would typically be the 3.3V supply - Pin 5 of the module (CSB) must be connected to Vcc to select the I²C interface |
| - Temperature - Humidity | HDC1080 Modul |  | HDC1080 | I²C interface (only 1 modul, default address: 0x40) |
| - Temperature - Humidity | TE Connectivity HTU21D |  | HTU21 | 20-pin Xplained Pro-compatible connector I²C interface Xplained Pro hardware identification chip Fully calibrated Selectable 8- to 12-bit resolution for humidity Selectable 12- to 14-bit resolution for temperature Very low power consumption |
| - Ported Pressure Sensor | Adafruit MPRLS |  | - | I²C interface, default addr.: 0x18 Vin - Power pin 3-5 VDC 3v3 - 3.3V output, max. 100mA SCL - I2C clock SDA - I2C data RST - Hardware reset (GND: reset) EOC - End Of Conversion output ✔ Arduino library |
| gas | MQ-nnn |  | MQ-2 (flamable gas) MQ-3 (alcohol) MQ-4 (CH4) MQ-5 (LPG, LNG, natural gas) MQ-6 (LPG, iso-butane,..) MQ-7 (CO) MQ-8 (H2) MQ-9 (CO, CH4, LPG) MQ-135 (NH3, benzene) | Analog and digital signals Pinout for modul: VCC: normally 5V GND: GND DO: Digital (alarm) signal, by setting a threshold value using the potentiometer AO: Analog (measuring) signal, 0..5 V Pinout for sensor: H-Pins: Out of the two H pins, one pin is connected to supply and the other to ground A-B-Pins: A pins and B pins are interchangeable. These pins will be tied to the supply voltage Preheat duration minimum 20 seconds Arduino library: ✔ |
| - Temperature - Humidity -CO² | SCD-30 modul | | SCD-30 | Pinout: - VDD: Supply Voltage (-0.3 V –6.0V) - GND: Ground - TX/SCL: Modbus: Transmission line (Push/Pull with 3V level) I²C:Serial clock(internal 45kΩ pull-up resistor, pulled to 3V, for higher voltages a level shifter is needed) - RX/SDA: Modbus: Receive line (Input must not exceed 5.5V) I²C:Serial data(internal 45kΩ pull-up resistor, pulled to3V, for higher voltages a level shifter is needed) - RDY: Data ready pin. High when data is ready for read-out - PWM: PWM output of CO² concentration measurement - SEL: Interface selectpin. Pull to VDD(do not exceed 4V, use voltage divider in case your VDD is > 4V)for selecting Modbus, leave floating or connect to GND for selecting I²C |
| Indoor Air Quality Sensor for TVOC and CO2eq Measurements | ENS-160 modul |  | ENS-160 | I²C interface default address: 0x40 wiring colors: - GND - VCC (3.3V / 5V) - SDA - SCL |
| Indoor Air Quality Sensor for TVOC and CO2eq Measurements | SGP30 modul |  | SGP30 | I²C interface default address: 0x58 wiring colors: - GND - VCC (3.3V / 5V) - SDA - SCL |
| Indoor Air Quality Sensor for VOC Measurements | SGP40 modul |  | SGP40 | I²C interface default address: 0x59 wiring colors: - GND - VCC (3.3V / 5V) - SDA - SCL |
| Air Quality Sensor for VOC and NOx Measurements | SGP41 modul | | SGP41 | I²C interface default address: 0x59 wiring colors: - GND - VCC (3.3V / 5V) - SDA - SCL |
| - Temperature - Humidity | SHTxx modul |  | SHT20 SHT30 SHT40 | I²C interface default address: 0x44/45 wiring colors: - black: GND - red: VCC (3.3V / 5V) - white: SDA - yellow: SCL |
| - Digital barometric pressure sensor | Tru TC-10093132 |  | - | Analog interface Voltage supply: 3.3 .. 5 V DC Pressure: 0 .. 40 KPa ✔ Arduino library |
| - Temperature - Humidity | UICPAL Temp.humi.sensor |  | - | Interface: Analog: 0-5V / 0-10V / 4-20mA RS485: Modbus RTU, default addr.:1 Temperature range: standard -40 .. 80℃ Humidity range: 0 .. 100%RH Accuracy: ±0.3℃ (0℃-65℃); ±3%RH (10%-90%) Power supply voltage: 10 .. 30V DC More information on LamaPLC (wiring, modbus map, ..) here |
Software example
The easiest way to find the example program for the current sensor is in the Arduino program in the “Library Manager”.
Example to oneWire wiring with DHT-11 sensor
In fact, only one pin is needed to connect oneWire, it can be even the 2nd - there is no rule for this. The supply voltage should be adjusted to the table above, in the case of the DHT 11 it can be 5V or 3.3V.
Example to I²C wiring with AM-2302 sensor
For I²C communication, pins A4 (SDA) and A5 (SCL) can be used, or the two unmarked pins before the AREF pin connected in parallel with them. According to the table above, the power supply can be 5V or 3.3V.
| Arduino pin | Modul pin | Description |
|---|---|---|
| 3.3 V or 5 V | Vin | According to the table above, the power supply can be 5V or 3.3V |
| GND | GND | - |
| A4 | SDA | Standard I²C connection |
| A5 | SCL | Standard I²C connection |
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