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
ModelPower
voltage
Measurement, range, accuracyCommunicationNote
Airflow Sensor
Airflow Sensor
Nebulizer Air Switch
Unidro
6025/6027 6025/6027
3.3V
(2.5 .. 4.5V)
Output voltage: 3.7VAnalogLoad current: 5mA
Response time: 46ms
Temperature measuringHumidity measuring
Temperature
Humidity
Adafruit
AM2315C 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%
I²CMeasure: 3.2 mW
Reaction time: 8s
Temperature measuringAir-pressure measuring
Temperature
Air-pressure
Bosch
BMP180 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 measuringHumidity measuringAir-press measuring
Temperature
Humidity
Air pressure
Bosch
BME280 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 measuringHumidity measuringAir-pressure measuring
Temperature
Humidity
Air pressure
Bosch
BME680 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 measuringAir-press measuring
Temperature
Air-pressure
Bosch
BMP280 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
Gas sensor
CO2
VOC
Sciosense
CCS811 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
Temperature sensor
Non-Contact Thermal Sensor
Omron
D6T-32L D6T-32L
5VNumber of elements: 1024 (32 × 32)
Current consumption: 19 mA
Object temperature detection:
D6T-32L-01A: 0 to 200°C
I²CResponse time: 200 msec
Arduino lib
Temperature sensor
Non-Contact Thermal Sensor
Omron
D6T-44L D6T-44L
5VNumber of elements: 16 (4 × 4)
Current consumption: 5 mA
Object temperature detection:
D6T-44L-06: 5 .. 50°C
D6T-44L-06H: 5 .. 200°C
I²CResponse time: 300 msec
Arduino lib
Temperature sensor
Non-Contact Thermal Sensor
Omron
D6T-8L D6T-8L
5VNumber of elements: 8 (1 × 8)
Current consumption: 5 mA
Object temperature detection:
D6T-8L-09: 5 .. 50°C
D6T-8L-09H: 5 .. 200°C
I²CResponse time: 250 msec
Arduino lib
Temperature sensor
Non-Contact Thermal Sensor
Omron
D6T-1A D6T-1A
5VNumber 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
I²CResponse time: 100 msec
Arduino lib
Temperature measuringHumidity measuring
Temperature
Humidity
DHT11 DHT113.3 / 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-Wire8 bit resolution, response time 10 sec
Temperature measuringHumidity measuring
Temperature
Humidity
DHT20 DHT203.3 / 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 measuringHumidity measuring
Temperature
Humidity
DHT22
AM2302
DHT22
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-
Temperature sensorPressure sensor
Barometric Pressure Sensor
Infineon
DPS310 DPS310
3.3VSupply 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 measuring
Temperature
Dallas
DS18B20 DS18B20
3.3 / 5 V
(3.3 .. 5.5V)
Temperature measurement range: -55 .. +125 °C
Temperature measurement accuracy: ±0.5°C
1-Wire9 to 12 bit (selectable) resolution
Conversion Time < 750ms
Current Consumption: 1mA
Gas sensor
NO²
MEMS
GM-102b GM-102
5VDetection Range: 0.1~10ppm (NO²)
Heater Resistance: 80Ω±20Ω(room temperature
analog signal-
Gas sensor
alcohol gas
MEMS
GM-302b GM-302
5VDetection Range: 1..500ppm (Ethanol vapor)
80Ω±20Ω(room temperature
analog signal-
Gas sensor
Alcohol (C2H5OH)
Hydrogen(H2)
Formaldehyde(CH2O)
MEMS
GM-502b GM-502
5VDetection: Alcohol (C2H5OH), 10..500ppm
Detection: Hydrogen(H2), 1..1000ppm
Detection: Formaldehyde(CH2O), 10..100ppm
analog signal-
Gas sensor
Carbon monoxide (CO)
Hydrogen (H2)
MEMS
GM-702b GM-702
5VDetection:
Carbon monoxide sensor (CO) : 10..5000ppm
Hydrogen sensor (H2): 10..500ppm
analog signal-
Gas sensor
TVOC
eCO2
ScioSense
ENS-160 ENS-160
3.3VDetection:
TVOC: 0..65000ppm
eCO2: 400..65000ppm
AQI-UBA1: 1..5 (Classified TVOC output signal)
I²C default addr.: 0x40-
Temperature measuringHumidity measuring
Temperature
Humidity
Texas Instruments
HDC 1080 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 measuringHumidity measuring
Temperature
Humidity
TE Connectivity
HTU21 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
Gas sensor
Carbon monoxide (CO)
Methane (CH4)
Ethanol (C2H5OH)
Propane (C3H8)
Butane (C4H10)
Hydrogen (H2)
Hydrogen sulfide (H2S)
Ammonia (NH3)
Fermion
MICS-5524 V1.0 MICS-5524 V1.0
5VThe 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-
Gas sensor
Smoke gas
Combustible gas
Winsen
MQ-2 MQ-2
5VFlammable 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 signalLifespan: 10 years
Preheat time: Over 24 hour
Gas sensor
Alcohol gas

Small sensitivy: Benzine gas
Winsen
MQ-3 MQ-3
5VDetecting concentration scope:0.05 mg / 10 mg/L Alcohol

Sensing Resistance: 1 MΩ - 8 MΩ (0.4 mg/L alcohol)
analog signalPreheat time: Over 24 hour
Gas sensor
CH4 gas
Natural gas
LNG


Small sensitivy:
Alcohol
Smoke
Winsen
MQ-4 MQ-4
5VDetecting concentration scope:200-10'000ppm CH4, natural gas

Sensing Resistance: 10KΩ- 60KΩ (1000ppm CH4)
analog signalPreheat time: Over 24 hour
Gas sensor
LPG
Iso-butane
Propane


Small sensitivy:
Alcohol
Smoke
Winsen
MQ-5 MQ-5
5VDetecting concentration scope:200-10'000ppm LPG,LNG, Natural gas, Iso-butane, Propane, Town gas

Sensing Resistance: 10KΩ- 60KΩ (5000 ppm methane)
analog signalPreheat time: Over 24 hour
Gas sensor
Town gas
Natural gas
LPG
LNG
Iso-butane
Propane


Small sensitivy:
Alcohol
Smoke
Winsen
MQ-6 MQ-6
5VDetecting concentration scope:200-10'000ppm LPG ,iso-butane, propane, LNG

Sensing Resistance: 10KΩ- 60KΩ (10'00ppm LPG)
analog signalPreheat time: Over 24 hour
Gas sensor
CO
Winsen
MQ-7 MQ-7
5VDetecting concentration scope:over 300 ppm CO (Carbon Monoxide)

Sensing Resistance: 2KΩ- 20KΩ (100 ppm CO)
analog signalPreheat time: Over 48 hour
Gas sensor
H2

Small sensitivy:
Alcohol
LPG
cooking fumes
Winsen
MQ-8 MQ-8
5VDetecting concentration scope:100-10000ppm Hydrogen (H2)

Sensing Resistance: 10KΩ- 60KΩ (1000 ppm H2)
analog signalPreheat time: Over 24 hour
Gas sensor
CO
CH4 gas
LPG
Winsen
MQ-9 MQ-9
5VDetecting 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 signalPreheat time: Over 48 hour
Gas sensor
NOx
NH3
alcohol
Benzene
smoke
CO2
Winsen
MQ-135 MQ-135
5VDetecting range:
10 ppm .. 300 ppm NH3
10 ppm .. 1000 ppm Benzene
10 ppm .. 300 ppm Alcohol

Sensing Resistance: 30KΩ- 200KΩ (100 ppm NH3)
analog signalPreheat time: Over 24 hour
Gas sensor
Oxigen
AlphaSense
O2-A2 O2-A2
5VRange of oxygen sensor: 0..30 %
Load resistance: 47-100 Ω
analog signal-
Gas sensorTemperature sensorHumidity sensor
CO2
humidity
temperature
SCD-30 SCD-303.3V / 5VHumidity 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 I²CResponse time: 20s
Sensor lifetime: 15 years
Gas sensorTemperature measuringHumidity measuring
CO2
Air-quality
Temperature
Humidity
Sensirion
SCD40-D-R2 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
Gas quality
VOC -
CO2-eq Sensor
Sensirion
SGP30 SGP30
1.8VSupply 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
Gas quality
Indoor Air Quality Sensor for VOC Measurements
Sensirion
SGP40 SGP40
3.3VSupply 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
Gas quality
Air Quality Sensor for VOC and NOx Measurements
Sensirion
SGP41 SGP41
3.3VSupply 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 measuringHumidity measuring
Temperature
Humidity
Sensirion
SHT20 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 measuringHumidity measuring
Temperature
Humidity
Sensirion
SHT21 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 measuringHumidity measuring
Temperature
Humidity
Sensirion
SHT25 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 measuringHumidity measuring
Temperature
Humidity
Sensirion
SHT30 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 measuringHumidity measuring
Temperature
Humidity
Sensirion
SHT31 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 measuringHumidity measuring
Temperature
Humidity
Sensirion
SHT35 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 measuringHumidity measuring
Temperature
Humidity
Sensirion
SHT40 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 measuringHumidity measuring
Temperature
Humidity
Siliconlabs
Si-7021 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 measuring
Temperature
Microchip
TC1047A 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
Gas sensor
Methane
Natural gas
GL Sciences
TGS-2611 TGS-2611
5VSensor resistance in 5000ppm of methaneat 20°C and 65% R.H.
Sensor resistance: 0.68 .. 6.8 kΩ in 5000 ppm methane
analog signalConditioning period before test: 7 days
2024/02/02 18:15

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
NamePicsSensorsDescription
Gas sensor
CO2
TVOC
CJMCU-811CJMCU-811CCS811I²C 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: ✔
Temperature measuringPressure measuring
- Barometric Pressure Sensor
Pressure Shield2GoPressure Shield2GoDPS310I²C or SPI
I2C default address: 0x76 (SDO←GND) or 0x77 (SDO←VDDIO)
✔ Arduino library
Gas sensor
CO
H2
Alcohol (C2H5OH)
Hydrogen(H2)
Formaldehyde(CH2O)
Alcohol gas
NO²
GRV GAS SENS V2GRV 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 measuringHumidity measuring
- Temperature
- Humidity
GY-21GY-21HTU21
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 measuringAir-press measuring
- Temperature
- Air-press
GY-68GY-68BMP180 - 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 measuringHumidity measuringAir-press measuring
- Temperature
- Humidity
- Air press
GY-BME280GY-BME280BME280- 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 measuringAir-press measuring
- Temperature
- Air press
GY-BMP280-3.3GY-BMP280BMP280- 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 measuringHumidity measuring
- Temperature
- Humidity
HDC1080 ModulHDC1080 ModulHDC1080I²C interface (only 1 modul, default address: 0x40)
Temperature measuringHumidity measuring
- Temperature
- Humidity
TE Connectivity
HTU21D
HTU21DHTU2120-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
Pressure measuring
- Ported Pressure Sensor
Adafruit
MPRLS
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 sensor
gas
MQ-nnnMQ-nnn
MQ-4
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: ✔
Gas sensorTemperature sensorHumidity sensor
- Temperature
- Humidity
-CO²
SCD-30 modulSCD-30SCD-30Pinout:
- 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
Gas quality measuring
Indoor Air Quality Sensor for TVOC and CO2eq Measurements
ENS-160 modulENS-160 modulENS-160I²C interface
default address: 0x40
wiring colors:
- GND
- VCC (3.3V / 5V)
- SDA
- SCL
Gas quality measuring
Indoor Air Quality Sensor for TVOC and CO2eq Measurements
SGP30 modulSGP30 modulSGP30I²C interface
default address: 0x58
wiring colors:
- GND
- VCC (3.3V / 5V)
- SDA
- SCL
Gas quality measuring
Indoor Air Quality Sensor for VOC Measurements
SGP40 modulSGP40 modulSGP40I²C interface
default address: 0x59
wiring colors:
- GND
- VCC (3.3V / 5V)
- SDA
- SCL
Gas quality measuring
Air Quality Sensor for VOC and NOx Measurements
SGP41 modulSGP41 modulSGP41I²C interface
default address: 0x59
wiring colors:
- GND
- VCC (3.3V / 5V)
- SDA
- SCL
Temperature measuringHumidity measuring
- Temperature
- Humidity
SHTxx modulSHTxx modulSHT20
SHT30
SHT40
I²C interface
default address: 0x44/45
wiring colors:
- black: GND
- red: VCC (3.3V / 5V)
- white: SDA
- yellow: SCL
Pressure measuring
- Digital barometric pressure sensor
Tru
TC-10093132
TC 10093132-Analog interface
Voltage supply: 3.3 .. 5 V DC
Pressure: 0 .. 40 KPa
✔ Arduino library
Temperature measuringHumidity measuring
- Temperature
- Humidity
UICPAL Temp.humi.sensorUICPAL 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

Example to oneWire wiring - 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

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 pinModul pinDescription
3.3 V or 5 VVinAccording to the table above, the power supply can be 5V or 3.3V
GNDGND-
A4SDAStandard I²C connection
A5SCLStandard I²C connection

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