Product Descriptions

The new serial port, i2c interface, and small volume sensor module have arrived. Please click the link to view:

https://item.taobao.com/item.htm?id=530877217164

The infrared IR non-contact temperature measurement module MLX90615 directly outputs data through the serial port, with a small size and no welding of pins by default

Connecting to a computer requires a USB to TTL serial port module:

http://item.taobao.com/item.htm?spm=a1z10.3 -c. W4002-8143572372.13. XgJOsS&id=26516664311

1. Provide computer software to view data

2. Provide the Arduino program

3. Provide 51 microcontroller programs

4. Provide STM32 program

Power supply: 3-5 volts

Current: 10ma

Baud rate: 9600 or 115200

Size: 18mm * 16.5mm * 5mm (length * width * height)

Installation hole 3mm, installation hole spacing 11.5mm, needle spacing 2.54mm

Using the original MLX90615 chip, with medical grade accuracy.

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Data download (copy to browser):

https://pan.baidu.com/s/1VaWj6A71NbEvPVX1LGHQWA

communication protocol

Serial Port Send Command Bytes:

(1) Serial communication parameters (default baud rate value 9600 bps, can be set through software)

Baud rate: 9600 bps Check bit: N Data bit: 8 Stop bit: 1

Baud rate: 115200 bps Check bit: N Data bit: 8 Stop bit: 1

(2) Module input command, sent by external controller to GY-MCU90615 module (hexadecimal)

1. Frame header: 0xa5

Instruction format: Frame header+instruction+checksum (8 bits) (such as automatic temperature reading instruction=0xA5+0x45+0xEA)

2. Command instructions:

Continuous output instructions:

0xA5+0x45+0xEA -------- Temperature data (module returns data type 0x45)

Query output instructions:

0xA5+0x15+0xBA -------- Temperature data (module returns data type 0x45)

Configuration command: (takes effect after power failure and restart)

Baud rate configuration:

0xA5+0xAE+0x53--------9600 (default)

0xA5+0xAF+0x54--------115200

Whether to automatically send temperature data configuration when powered on:

0xA5+0x51+0xF6-- -- Automatically output temperature data after power on (default)

0xA5+0x52+0xF7-- -- -- Does not automatically output temperature data after power on

communication protocol

Serial port reception:

(1) Serial communication parameters (default baud rate value 9600 bps, can be set through software)

Baud rate: 9600 bps Check bit: N Data bit: 8 Stop bit: 1

Baud rate: 115200 bps Check bit: N Data bit: 8 Stop bit: 1

(2) Module output format, each frame contains 9 bytes (hexadecimal):

① Byte0: 0x5A frame header flag

② Byte1: 0x5A frame header flag

③ Byte2: 0X45 frame data type (0X45: temperature data)

④ Byte3: 0x04 data volume (using 2 sets of 4 data as examples)

⑤ Byte4: 0x00~0xFF data 1 high 8 bits

⑥ Byte5: 0x00~0xFF Data 1 low 8 bits

⑦ Byte6: 0x00~0xFF data 2 high 8 bits

⑧ Byte7: 0x00~0xFF Data 2 low 8 bits

⑨ Byte8: 0x00~0xFF checksum (the accumulated sum of previous data, leaving only the lower 8 bits)

(3) Data calculation methods

Temperature calculation method:

Temperature=8 high bits<<8 low bits (the result is the actual angle multiplied by 100)

Example: Sending instruction: A5 45 EA, receiving a frame of data:

<5A-5A-45-04-0C-78-0D-19-A7>

Representing TO (signed 16 bit, indicating target temperature): TO=0x0C78/100=31.92 ℃

TA (signed 16 bit, indicating ambient temperature): TO=0x0D19/100=33.53 ℃

Usage

This module outputs data through a serial port. After connecting through the serial port, the user sends output instructions, such as 0xA5+0x45+0xEA, to the module, which will continuously output temperature data; If you want to output through query, you can send 0xA5+0x15+0xBA to the module. Each time it is sent, the module will return temperature data, and the query frequency should be less than 10Hz. If it needs to be higher than 10Hz, please use continuous output mode, that is, send the 0xA5+0x45+0xEA command;

Screenshot of computer software:

Use the USB to TTL module to connect to the computer and view data through the software. Steps:

1. Wiring, USB to TTL -------- GYMCU90615V2

5V -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- VIN

GND -- -- -- -- -- -- GND

RX -- -- -- -- -- -- -- -- -- -- -- TX

TX -- -- -- -- -- -- RX

2. Connect the computer from USB to TTL, install the driver, and check the corresponding COM port in the computer device management

3. Open the computer software and select the corresponding COM port in the port number column. If COM is not displayed, you can manually enter it

4. Select 9600 in the baud rate column

5. Finally, click to open the serial port.

Note: The module I/O is at TTL level and can be directly connected to the microcontroller serial port. It can also be directly connected to chips such as PL2303, CH340, FT232, etc., but cannot be directly connected to the computer nine pin serial port.

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