DTPA-UART DIWELL | Alldatasheet

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Non-contact 32ⅹ32 Pixel Infrared Temperature Sensor Page 1 of 3 1.0.0 Product Specifications laboratory temperature conditions: 25℃. Parameter min Typ Max Unit Supply voltage 4.5 5 5.5 V Supply current 35 mA pixels 1024 px Spectral range 7.7 15 ㎛ Object temperature range(*) -10 200 ℃ Operating temperature -20 70 ℃ IR refresh rate 2 Hz Accuracy(**) ±2 % Resolution digital 0.1 ℃ Emissivity(fixed) 0.97  Standard start-up time 30 sec Stabilization time 1 min FOV 33° ⅹ 33° Weight (without cable) 8.3g Communication interface UART TTL Relative humidity 95% Max. non-condensing *: The DTPA can detect higher temperatures, but is not calibrated above 200℃ **: ±2% of reading or ±2℃ whichever is greater. All accuracy specifications only apply under settled isothermal conditions and specified for the central pixel(527). 32ⅹ32 Optical Orientation Dimensions / Pin Configuration unit: mm Top view Side view Bottom view Bottom view No. Name Description 1 5V supply voltage 2 TX UART Output 3.3V 3 RX UART Input 3.3V (5V tolerant)

4 GND ground

※ Connector information: molex - pcb side 5267-04A (P/N 22035045) - mates with 5264-04 (P/N 50375043) Calculate Field of View The FOV determines the size of the infrared measurement area according to the distance. Y = distance(cm)ⅹ𝐭𝐚𝐧( 𝟏𝟔. 𝟓° )ⅹ2 e.g. Y = 100cm*0.296213*2 ≒ 59.243 cm Y = 200cm*0.296213*2 ≒ 118.485 cm size of 1 pixel (distance: 1m)

Non-contact 32ⅹ32 Pixel Infrared Temperature Sensor Page 2 of 3 1.0.0 UART Protocol - BaudRate: 115,200bps(fixed), data bit: 8, stop bit:1, parity: none, flow control: none - I/O is 3.3V LV TTL ( 5V tolerant ) Timing - The minimum data request cycle is 500ms, regardless of the number of request data. UART Data Format - request command - The frame of request data consists of 6 bytes. The byte structure is explained below. Note that an ’X’ refers to a variable bit containing dynamic data. Request (main → DTPA) Byte Field Name data DEC

1 START 0x11 17

2 Start Address(MSB) 0b00000XXX 0…1024(*) 3 Start Address(LSB) 0bXXXXXXXX

4 No. of Register(MSB) 0b00000XXX 1...1025(**) 5 No. of Register(LSB) 0bXXXXXXXX

6 END 0x98 152

(*) Start Address(SA): minimum: 0 maximum: 1024 (**) No. of Register(NR) ≤ (1025-SA) , minimum:1, maximum: 1025 The accessible address is limited to the address map table. Otherwise there is no response from the sensor.(see Address map) e.g. SA:1024, NR: 1 (ok) SA:1024, NR: 2 (X) - no response SA:1, NR:1024 (ok) SA:1, NR:1025 (X) - no response The (SA, NR, response data)structure would be: 0x[MSB][LSB], where MSB and LSB are each two hexadecimal numbers (8 bits). - response data - The number of bytes in the response frame depends on the NR. Response (DTPA → main) Byte Field Name data DEC

1 START(MSB) 0x16 22

2 START(LSB) 0x98 152

3 Temperature of the SA(MSB) 0xXX

4 Temperature of the SA(LSB) 0xXX

… … (NR*2)+1 Temperature of the end address(MSB) 0xXX (NR*2)+2 Temperature of the end address(LSB) 0xXX (NR*2)+3 END(MSB) 0x1A 26 (NR*2)+4 END(LSB) 0x9C 156 e.g. No. of Register(NR): 2 → total response bytes: (2*2)+4 = 8 bytes No. of Register: 1025 → (1025*2)+4= 2054 bytes Address map Address Data Length Type Description HEX DEC Short 0x0000 0 1 Signed Ambient Temperature(Ta) 0x0001 1 1 Signed Temperature of PIXEL 0 0x0002 2 1 Signed Temperature of PIXEL 1 0x0003 3 1 Signed Temperature of PIXEL 2 0x0004 4 1 Signed Temperature of PIXEL 3 : : : : : : : : : : 0x03FF 1023 1 Signed Temperature of PIXEL 1022 0x0400 1024 1 Signed Temperature of PIXEL 1023 The data is in 2’s complement format. - Request command examples: Read all temperatures: 0x11,0x00,0x00,0x04,0x01,0x98 (6-byte) SA: 0 NR: 0x0401(1025d) Read PIXEL 0…1023: 0x11,0x00,0x01,0x04,0x00,0x98 (6-byte) SA: 1 NR: 0x0400(1024d) Temperature Calculation The result is calculated by following expressions (valid for both PIXEL and Ta): 1. Convert it to decimal value i.e. 0x016D = 365d 0x00FF = 255 → 25.5℃ Tutorial(Raspberry Pi 2) - Requirements Hardware: Raspberry Pi 2 , DTPA-UART-3232 Software: wiringPi library - Connection Diagram - Sample code https://www.diwellshop.com/web/en/DTPA/DTPA_raspberry2_example.zip - Expected Results.

Non-contact 32ⅹ32 Pixel Infrared Temperature Sensor Page 3 of 3 1.0.0 Products handling precaution ※ When it comes to dust removal by air, the best method is to use a blower, and to avoid using compressed air. ※ Do not press the lens with your hands or any other object. ※ Do not scratch the lens surface with sharp objects. ※ Voluntary disassembly and modification of the product is prohibited. ※ Avoid direct sunlight, chemical substance, heat or fire. ※ Water resistance is not guaranteed. ※ Do not hold the sensor by hand during the measurement. ※ For stable temperature measurement, avoid measurement immediately after turning on the power of the sensor. And power must always be supplied, not on/off PC Software The program runs in the Windows 10 environment. It is not guaranteed to be used on other OS. For more information, refer to the Test Board manual. https://www.diwellshop.com/web/en/DTPA/DTPA-UART-3232_Testboard_en.pdf - sample images Additional information Manufacturer: DIWELL Electronics Co., Ltd. (South Korea) Technical support: mailto:expoeb2@diwell.com, mailto:dsjeong@diwell.com

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