Environment X6 Sensor

SKU	Product
34169	Environment X6 Sensor

Features

• The Environment X6 Sensor is based on Germany EC Sense's solid-state polymer electrochemical technology. It employs a multi-electrode integrated structure and a solid-state electrolyte system. The gas undergoes an electrochemical reaction on the working electrode surface, outputting a current signal to achieve high-sensitivity detection of target gas concentrations. Compared to traditional gas sensors, the solid-state polymer design offers advantages such as no liquid leakage, no poisoning, essentially no drift, and long service life.

Application Scenarios

• Smart Home
• Ambient Air Quality Monitoring
• Vehicle Air Purifiers
• Handheld Air Quality Detectors
• Factory Workshop Fresh Air Systems

Working Principle

• The solid-state polymer electrochemical sensor internally uses a classic three-electrode system structure (Working Electrode WE, Reference Electrode RE, Counter Electrode CE) with multi-layer printing process technology. Through the design of multi-layer catalytic active sites on a single electrode, a diffusion control layer structure, and intelligent signal decoupling algorithms, parallel detection and identification of multiple gases are achieved.

Specifications

Environment X6 Sensor
Supply Voltage	5V	Logic Voltage	3.3V
Communication Interface	UART	Communication Baud Rate	9600 bps
Measurement Range	HCHO: 0-1 ppm TVOC: 0-5 ppm CO: 0-100 ppm	Resolution	HCHO: 0.001 ppm (Effective detection value: 0.015 ppm) TVOC: 0.001 ppm (Effective detection value: 0.050 ppm) CO: 0.001 ppm (Effective detection value: <8 ppm)
Accuracy Error	HCHO: 0-0.15 ppm (±0.02 ppm); 0.16 ppm+ (< ±2% FS) TVOC: 0-0.2 ppm (±0.05 ppm); 0.2 ppm+ (< ±2% FS) CO: 0-8 ppm (±2.5 ppm); 8 ppm+ (< ±1% FS)	Response Time	HCHO: T10 <5 s; T90 <90 s TVOC: T10 <3 s; T90 <120 s CO: T10 <3 s; T90 <15 s
Product Dimensions	23 × 25.5 × 9.5 mm	Mounting Hole Diameter	2.0 mm
Operating Current	6.5 mA	Operating Temperature	-40 ℃ ~ +55 ℃
Operating Humidity	>15％RH	Service Life	10 years

• The IO level of the sensor is 3.3V. If using a 5V IO level, level conversion is required; otherwise, the sensor may be damaged.

Pin Description

Pin	ID	Description
1	VCC	5V Positive Power Supply
2	GND	Ground Pin
3	RXD	UART Input
4	TXD	UART Output

Protocol Analysis

Click to expand

UART Communication Process

• The default serial port configuration is: 8 data bits, 1 stop bit, no parity, no flow control, default baud rate 9600.
• The protocol consists of a command header, Data, and 0-add8 (checksum).
• Note: The protocol packet follows big-endian format, i.e., high byte first, low byte last.

Command Introduction

• Gas Concentration Units

 0x00:IAQ
 0x02:ppm
 IAQ Value Explanation, based on EPA standards
 0～50 Good
 51～100 Moderate
 101～150 Unhealthy for Sensitive Groups
 151～200 Unhealthy
 201～300 Very Unhealthy
 301～500 Hazardous

• Sensor Type Table

 IAQ:0x33
 TVOC:0x18
 HCHO:0x17
 CO:0x19

• Query Current Concentration
  • The command format to read the current concentration is as follows:

Command Header	Checksum
Byte0	Byte1
70	0-add8

• Query Data Decoding
  • After sending the query current concentration command, the module returns the following data:

Command Header	IAQ Data	TVOC Data	HCHO Data	CO Data	Temperature Data	Humidity Data	Checksum
Byte0	Byte1-Byte4	Byte5-Byte8	Byte9-Byte12	Byte13-Byte16	Byte17-Byte18	Byte19-Byte20	Byte21
70	42 30 00 00	3D 35 64 F0	3D 53 D2 5B	3D 08 19 55	0A C8	27 0F	E0

• Parsing Table

 Send Parsing:
 0x70----------------------Command header
 0x90----------------------Checksum
 Receive Parsing:
 0x70----------------------Command header
 0x42 0x30 0x00 0x00---------0x42300000 IAQ detected gas concentration value, converted to float: 44.000f
 0x3D 0x35 0x64 0xF0---------0x3D3564F0 TVOC detected gas concentration value, converted to float: 0.044f
 0x3D 0x53 0xD2 0x5B---------0x3D53D25B HCHO detected gas concentration value, converted to float: 0.052f
 0x3D 0x08 0x19 0x55---------0x3D081955 CO detected gas concentration value, converted to float: 0.033f
 0x0A 0xC8-----------------0x0AC8 = 2760, two decimal places, temperature: 27.6 ℃
 0x27 0x0F-----------------0x270F = 9999, two decimal places, humidity: 99.99% rh
 0xE0----------------------Checksum

• Read Sensor Parameters
  • The command format to read sensor parameters is as follows:

Command Header	Gas ID	Checksum
Byte0	Byte1	Byte2
72	00	0-add8

• Query Data Decoding
  • After sending the read sensor parameters command, the module returns the following data:

Command Header	Gas ID	Gas Name	Range	Unit	Checksum
Byte0	Byte1	Byte2	Byte3-Byte4	Byte5	Byte6
72	00	19	03 E8	02	87

• Parsing Table

  Send Parsing:
  0x72----------------------Command header

  0x00----------------------IAQ
  0x01----------------------TVOC
  0x02 ---------------------- HCHO
  0x03 ---------------------- CO

  0x8D----------------------Checksum
  
  Receive Parsing:
  0x72----------------------Command header
  0x00----------------------IAQ
  0x33----------------------Detected gas name
  0x03 0xE8 --------------- 0x01F4 = 500, Range: 500 500
  0x00----------------------Concentration unit, derived from the Gas Concentration Unit Table: IAQ
  0x87----------------------Checksum

• Read LED Status
  • The command format to read the LED status is as follows:

Command Header	Checksum
Byte0	Byte1
74	0-add8

• Query Data Decoding
  • After sending the read LED status command, the module returns the following data:

Command Header	LED Status	Checksum
Byte0	Byte1	Byte2
74	01	8B

• Parsing Table

 Send Parsing:
 0x74----------------------Command header
 0x8C----------------------Checksum
 
 Receive Parsing:
 0x74----------------------Command header
 0x01----------------------LED blinking status (0x00: off, others: blinking)
 0x8B----------------------Checksum

• Set Operation LED Status
  • Downlink Command (Tx) Format:

Command Header	LED Control	Checksum
Byte0	Byte1	Byte2
56	00	0-add8

• Uplink Data (Rx) Format:

Command Header	Reserved	Return Value	Checksum
Byte0	Byte1	Byte2-Byte3	Byte4
56	00	4F 4B	10

• Parsing Table

 Send Parsing:
 0x56----------------------Command header
 0x00----------------------Turn off the operation LED
 0xAA----------------------Checksum
 
 Receive Parsing:
 0x56----------------------Command header
 0x00----------------------Reserved
 0x4F 0x4B--------------Setting successful
 0x10----------------------Checksum

• Enter Sleep Mode
  • The command format to enter sleep mode is as follows:

Command Header	Sleep Command	Checksum
Byte0	Byte1	Byte2
54	00	0-add8

• Query Data Decoding
  • After sending the enter sleep mode command, the module returns the following data:

Command Header	Sleep Status	Checksum
Byte0	Byte1	Byte2
54	00	4F 4B

• Parsing Table

 Send Parsing:
 0x54----------------------Command header
 0x73 0x6C 0x65 0x65 0x70----ASCII: sleep
 0x93----------------------Checksum
 
 Receive Parsing:
 0x54----------------------Command header
 0x00----------------------Reserved
 0x4F 0x4B--------------Execution successful
 0x12----------------------Checksum

• Exit Sleep Mode

Command Header	Wake Command	Checksum
Byte0	Byte1	Byte2
55	0-add8

• Query Data Decoding

Command Header	Reserved	Return Value	Checksum
Byte0	Byte1	Byte2-Byte3	Byte4
55	00	4F 4B	11

• Parsing Table

 Send Parsing:
 0x55----------------------Command header
 0x61 0x77 0x61 0x6B 0x65----ASCII: awake   
 0xA2----------------------Checksum
 
 Receive Parsing:
 0x55----------------------Command header
 0x00----------------------Reserved
 0x4F 0x4B--------------Execution successful
 0x11----------------------Checksum

• Get Sensor Serial Number

Command Header	Checksum
Byte0	Byte1
71	0-add8

• Query Data Decoding

Command Header	Sensor SN	Checksum
Byte0	Byte1- Byte6	Byte7
71	12 34 56 78 91 23	C7

• Parsing Table

 Send Parsing:
 0x71----------------------Command header
 0x8F----------------------Checksum
 
 Receive Parsing:
 0x71----------------------Command header
 0x12 0x34 0x56 0x78 0x91 0x23---Sensor serial number: 123456789123
 0xC7----------------------Checksum

• Get Software Version

Command Header	Checksum
Byte0	Byte1
73	0-add8

• Query Data Decoding

Command Header	Firmware Version	Checksum
Byte0	Byte1- Byte19	Byte20
73	69 4E 6F 73 65 58 36 32 30 32 35 31 31 31 32 31 34 33 39	A2

• Parsing Table

 Send Parsing:
 0x73----------------------Command header
 0x8D----------------------Checksum

 Receive Parsing:
 0x73----------------------Command header
 0x69 0x4E 0x6F 0x73 0x65 0x58 0x36 0x32 0x30 0x32 0x35 0x31 0x31 0x31 0x32 0x31 0x34 0x33 0x39
 Converted to ASCII:
 iNoseX6202511121439
 0xA2----------------------Checksum

API Introduction

Click to expand

• environment_x6_init(): Environment X6 Sensor initialization
• environment_x6_get_concentration(): Get real-time concentration values
• environment_x6_get_sensor_param(): Get sensor parameters, including measurement range and units
• environment_x6_get_led(): Get LED status (on/off)
• environment_x6_set_led(): Set LED status
• environment_x6_sleep(): Put the sensor to sleep
• environment_x6_wakeup(): Wake up the sensor
• environment_x6_get_serial(): Get the serial number (SN)
• environment_x6_get_version(): Get the version number

Quick Test

• Test software Serial Debug Assistant together with Serial Tool, mainly for: quick testing
• Test Preparation
  • Windows computer
  • USB TO TTL (B) 1PCS
  • Environment X6 Sensor 1PCS
  • Matching cables
• Hardware Connection
  • Refer to the following diagrams for connection
• Start Test
  • Connect the serial port to the USB port of the computer
    • Use a serial debug assistant (SSCOM), select the correct port number, baud rate 9600, open the serial port, and set the checksum to 0-add8
    • Send the command in hexadecimal: 70, then you can read the data:
• ①Send query command
• ②Obtain real-time data