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Super Low Power CO2 Sensor Module-CM1106SL

Super Low Power CO2 Sensor Module-CM1106SL
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Super Low Power CO2 Sensor Module-CM1106SL - 1

Preliminary Version Software Version:V1.07-100MS Product Name: Super Low Power CO2 Sensor Module Item No.: CM1106SL Version: V0.3 Date: July 16, 2019

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Super Low Power NDIR CO2 Sensor Module CM1106SL Applications ▪ HVAC industry ▪ Detecting units with battery operation ▪ Portable instruments Description CM1106SL is super low power consumption, high performance NDIR CO2 sensor, which can be used to detect CO2 concentration of indoor air by adopting advanced non-dispersive infrared (NDIR) technology. It is ideally suited for HVAC industry, detecting units with battery operation, portable instruments, etc. ▪ NDIR technology with independent intellectual property ▪ Super low power consumption ▪ High accuracy, long-term stability, long life...

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Note 1: Sensor is designed to measure in the range 0-2000ppm with specified in the table accuracy. If the sensor are in less than 400ppm environment, it may affects the accuracy of ABC logic, so please close ABC logic. Note 2: Accuracy is defined with 10-35°C,0-80%RH Note 3: The output is a single data during working period. To get more stable output in continuous working periods, moving average strategy could be added to by handling data from multi working periods. To get more information or suggestion, please contact info@gassensor.com.cn

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1. Dimensions (Unit mm, tolerance ±0.2 mm)

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Sensor power supply pin (5V) ） Sensor power supply switch pin（5V） Light source power supply input (5V) (Note: VCAP connects with VBB internally, it is recommended to suspend or connect 5V) 4. The explanation of Pin working VBB Status VCAP Status Sensor Status Reference Circuit Application scene 1 : UART TTL 3V serial port output ( Continuous Working Mode) Figure 2 UART communication connection circuit

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Application scene 2: UART TTL 3V serial port output (Single Working Mode)

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Description of Calibration CM1106SL support power-off memory and could do auto-calibration through following mode: Auto-calibration under automatic data counting storage mode The user could set auto-calibration period by command in protocol. Auto-Calibration: Auto-calibration under automatic data counting storage mode: When user want to use automatic data counting storage mode, automatic data counting storage function needs to be open. Under this mode, the user could set calibration period from 1 to 10, the default is 7. If the calibration period is set over 10, it will be set as 7 by...

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Calculation and communication Sensor power off Explanation of Working Mode The working mode of CM1106SL is host-slave mode: CM1106SL is a slave and it begins to work after getting EN_VBB pin high level and getting power from the host. After powering on for 44ms, the sensor starts to work. After 100ms working period (the light source flashing 100ms), MCU continues sampling 30ms.After 130ms sampling done, CM1106SL starts a calculation on measured CO2 concentration. Then the host could communicate with CM1106SL when the RDY pin goes low level. After communication, the host will put EN_VBB pin...

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Product Installation 1. In order to ensure airflow diffusion into the sensor inner, make sure the minimum distance between the area of waterproof filter and the other components is 1.5 mm, otherwise, quick response time of the sensor will be effected. Reference as below: Waterproof Filter 2. To avoid the influence of stress on sensor, please soldering by hand as much as possible when mounting the sensor to the PCB. Reference as below:

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UART Communication Protocol 1. General Statement 1).The data in this protocol is all hexadecimal data. For example, “46” for decimal [70]. 2). Baud rate: 9600, Data Bits: 8, Stop Bits: 1, Parity: No, Flow Control: No. 3). [x x] is for single-byte data (unsigned, 0-255); for double data, high byte is in front of low byte. 2. Format of Serial Communication Protocol Sending format of test software: Start Symbol Detail description on protocol format: Protocol Format Start Symbol Sending by test software is fixed as [11H], module response is fixed as [16H] Length of frame bytes= data length +1...

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4.1 Read Measured Result of CO2 Send: 11 01 01 ED Response: 16 05 01 DF1- DF4 [CS] Function: Read measured result of CO2 (Unit: ppm) Note: CO2 measured result = DF1*256+DF2 DF3, DF4 is reserved Example: Response: 16 05 01 02 58 00 00 8B Explanation: Hex is converted to decimal: 02 is 02; 58 is 88 CO2 concentration =02*256+88 = 600ppm 4.2 Set ABC Parameter Send: 11 07 10 DF1 DF2 DF3 DF4 DF5 DF6 CS Response: 16 01 10 D9 Function: Set ABC parameter Explanation: DF1: reserved, default 100 (0x64) DF2: open/close auto calibration (0: open; 2: close, the default is close) DF3: calibration cycle...

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1. Calibration target value = DF1*256+DF2 Unit: PPM, range (400-1500ppm) 2. Before calibration, please make sure CO2 concentration in current ambient is calibration target value. Keeping this CO2 concentration for two 2 minutes, and then began calibration. Example: When you need to calibrate CO2 concentration of the sensor to 600ppm, send command: Send: 11 03 03 02 58 8F Hex is converted to decimal: 02 is 02; 58 is 88 CO2 concentration =02*256+88 = 600ppm 4.4 Set Measurement Period Send: 11 03 50 DF1 DF2 CS Response: 16 01 50 99 Function: Set measurement period Note: Measurement period =...

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Preheating Mechanism 1. Light source working sequential chart Signal0 stands for light source working sequential chart in normal situation. Signal1 stands for light source working sequential chart after sending the preheating demand. 1.The light source flashes 100ms, the working period is 2 minutes as default. (the working period can be changed by demand). 2.After sending the preheating demand to the sensor, it will work immediately. The light source continues flashing 5 times, every time the light source flashing 60ms, stopping 40ms (as Signal1 shows). During preheating period, the sensor...

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After-Sales Services and Consultancy Cubic Sensor and Instrument Co.,Ltd. Tel: +86 (0)27 81628827 Fax: +86 (0)27 81628821 Add: Fenghuang No.3 Road, Fenghuang Industrial Park, Eastlake Hi-tech Development Zone, Wuhan 430205, China E-mail: info@gassensor.com.cn

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