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Reference: DWM14042301
Spring antenna is specialized for wireless data transmission. This antenna with good performance of V.S.W.R, small size design, easily installation, stable performance and good anti-shock and anti-aged compatible for Hoperf Modules.
Reference: DWM14032902
SMA rf antenna connector is pallets copper gold andexternal thread needle sma pallets plate rf connector.
Reference: DWM14032102
Whip antenna for sub-1 GHz, 433MHz,868MHz and 915MHz with SMA male connectors.it's used with wireless module recommanded by Hoperf .
Reference: DWM14042401
SMA RG178 extension female cable for GPS, GSM antenna,RF module, SMA cable,IPEX to SMA jumper cable.
Reference: DWM18032302
USD3.0/pcs MOQ100pcs LoRa Antenna designed for Lora application which required for outdoor waterproof highgain and work at ISM free band like 433MHz /868MHz /915MHz SMA Male Whip antenna.
Reference: DWM16121503
DWM-TLB-3.0QB SUB-1GHz / 2.4GHz Whip antenna with a Collapsible SMA male connectors.Which are available for 433MHz,868MHz.915MHz and 2.4GHz..
Reference: DWM15101001
Brand: Semtech
RFM50 module series’ design is based on the high performance RF50 SoC chip, It include a CIP-51 core‘ MCU and 100mW transceiver. It operate at 433/470/868/915 MHz ISM band, comply with FCC, ETSI regulation.
Reference: DWM15010504
Brand: Semtech
The RFM69CW /RFM69HCW are built in by SX1231and SX1231H which is ISM Free band transceiver module capable of operation over a wide frequency range, including the 433MHz,868MHz and 915MHz.
The MH-Z19C carbon dioxide gas sensor (hereinafter referred to as the sensor) is a general-purpose intelligent small sensor that uses the principle of non-dispersive infrared (NDIR) to detect the presence of C02 in the air. And other features; built-in temperature compensation: simultaneously has serial output, PWM output, easy to use. The sensor is a high-performance sensor made by closely combining mature infrared absorption gas detection technology with sophisticated optical circuit design and sophisticated circuit design.
Product parameters:
Detection gas: carbon dioxide
Power supply voltage: DC (5.0 ±0.1) V
Average current: <40mA (@5V power supply)
Peak current:125 to (@5V power supply)
Interface level:3. 3v (compatible with 5v)
Measuring range:400-5000PPM optional
Output signal: serial UART (TL level 3.3V)
Warm-up time: 1min
Response time: T90< 120s
Working temperature:-10-50degree
Working humidity: 0~95%RH (no condensation)
Pin description:
Vin: Power +(in)
GND: power supply-(GND)
PWM: PWM
Hd: HD (zero calibration, low level is effective for more than 7 seconds)
Rx: UART (RXD) TTL level data input
Tx: UART (TXD) TTL level data output
Output method:
PWM output
Assume the measurement range is 400-2000ppm
CO2: Concentration output range: 400-2000ppm
Period: 1004ms±5%
High level output at the beginning of the cycle: 2ms (theoretical value)
Central period: 1000ms±5%
Low level output at the end of the period: 2ms (theoretical value)
Calculation formula for obtaining current CO2 concentration value by PWM: Cppm=2000X (TH-2ms)/(TH+TL-4ms)
Cppm: CO2 concentration value calculated by the unit of ppm
TH: the time when the output is high level in one output cycle
TL: the time when the output is low in one output cycle
Serial output (UART)
Hardware connection, connect the sensor's Vin-GND-RXD-TXD to the user's 5V-GND-TXD-RXD. (User terminal must use TTL level)
Precautions:
1. In the process of welding, installation and use of the sensor, the gold-plated plastic cavity should be prevented from withstanding pressure in any direction.
2. If the sensor needs to be placed in a small space, this space should be well ventilated, especially the two diffusion windows should be in a well ventilated position.
3. The sensor should be far away from the heat source, and avoid direct sunlight or other heat radiation.
4. The sensor should be calibrated regularly, and the calibration period is recommended to be no more than 6 months.
5. Do not use the sensor for a long time in the environment with high dust density.
6. In order to ensure that the sensor can work normally, the power supply voltage must be maintained at (5.0 ±0.1) VDC. The power supply current must not be less than 150mA
7. If it is not within this range, the sensor may be faulty, the output concentration of the sensor is low or the sensor cannot work normally.
8. When manually calibrating the zero point or sending the command to calibrate the main points, it must be stable
9. Work continuously for more than 20 minutes in a gas environment (400ppm).
10. The sensor is prohibited to use wave peak depth.
11. When welding with iron, set the temperature to (350±5) degree, early
12. The pick-up time must be less than 35.
13. When using the sensor, it is recommended that the customer use the method of inserting the solder bump to directly insert and remove the sensor for toilet maintenance.
Arduino library for the MH-Z19X CO2 sensor
User Manual for MH-Z Series Infrared CO2 Sensor Module Communication Protocol
MH-Z19C works on Uno but not on Mega
The Englisih datasheet for the MH-Z19: MH-Z19
The English datasheet for the non-JST MH-Z19B version: MH-Z19B NON-JST.
The Chinese datasheet for the JST MH-Z19B version (more detailed): MH-Z19B JST.
Reference: DWM22051601
The DLOS8N /DLOS8N-EC25 Outdoor LoRaWAN Gateway includes 1pcs SX1302 and 2pcs SX1250 LoRa Tranceiver which provide 10 programmable parallel demodulation paths.
Reference: DWM22092802
WSS-03 is a RS485 Air Quality sensor. It can monitor CO2, PM2.5 and PM10 at the same time by RS485 interface to WSC1-L which can detect and upload the environment CO2, PM2.5 and PM10 to the IoT Server via wireless LoRaWAN protocol.
Reference: DWM23030701
MH-Z19E NDIR infrared gas module Built-in temperature compensation; and it has UART output and PWM output It uses the principle of non-dispersive infrared (NDIR) to detect CO2 in the air and has good selectivity. No oxygen dependence, long life, etc.
Reference: DWM23031001
ZPHS01 module integrates Electrochemical formaldehyde,Semiconductor VOC sensor, Laser particle sensor, NDIR CO2 sensor and temperature& humidity sensor.
Reference: DWM15081101
The TSL2561 Luminosity Sensor Breakout is a sophisticated light sensor which has a flat response across most of the visible spectrum.
Reference: DWM23031202
ZH03B PM2.5 Dust Sensor Particle sensor is widely used in air quality monitoring equipment, air purifiers, ventilation systems, air conditioner, and smart home equipment.
Reference: DWM18021501
37 sensor modules In 1 Sensor Kits great package for Arduino Raspberry Pi Beginner Learning.
Reference: DWM14032107
The HP203B / HP206C are 24Bit Barometer sensor, employs a MEMS pressure sensor with an I2C interface to provide accurate temperature, pressure or altitude data.
Reference: DWM14102401
Low cost Ultrasonic Module HC-SR04 Distance Measuring Transducer Sensor For Arduino.
Reference: DWM23031001
ZPHS01 module integrates Electrochemical formaldehyde,Semiconductor VOC sensor, Laser particle sensor, NDIR CO2 sensor and temperature& humidity sensor.
Reference: DWM18121802
DWM-WWR Spot new weather station wind speed sensor wind direction and rainfall Internet of things Secondary development .
Reference: DWM22101701
DWM-M702 seven-in-one sensor module is a cost-effective digital serial port output sensor module, which adopts 485/UART output mode and integrates CO2, HCHO, TVOC,PM2.5,PM10, temperature and humidity.
Reference: DWM23030701
MH-Z19E NDIR infrared gas module Built-in temperature compensation; and it has UART output and PWM output It uses the principle of non-dispersive infrared (NDIR) to detect CO2 in the air and has good selectivity. No oxygen dependence, long life, etc.