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User Manual

Intelligent Rain Detection

Module User Manual

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Summary of Contents for SEN0545

Page 1: ...User Manual Intelligent Rain Detection Module User Manual...

Page 2: ...ement method high robustness against strong sunlight Less environmental interference and longer service life since the product is used inside windshields without direct exposure to external natural en...

Page 3: ...RT Communication The UART configuration is shown in Table 1 1 Table 1 1 UART Configuration Baud Rate 115200 Data Bit 8bit Stop Bit 1bit Check Bit NONE Each UART command includes 5 Bytes of data and th...

Page 4: ...Light rain 2 Moderate rain 3 Heavy rain 2 System Status 0 System normal 1 RS200 Internal communication error 2 LEDA damaged 3 LEDB damaged 4 Optical system calibration not good 5 Parameter configurati...

Page 5: ...ld S2 0 65535 Light rain moderate rain threshold S2 11 Moderate rain heavy rain threshold S3 0 65535 Moderate rain heavy rain threshold S3 12 Threshold of the number of times determined to be heavy ra...

Page 6: ...he host sends a command the 3Byte data of the frame flag and frame data will be used as an input parameter of function xCal_crc and the check value will be calculated and filled into frame checksum to...

Page 7: ...ly from the module it means that the communication works normally otherwise there is something wrong with communication line Each command sent by the host must be continuous 5Byte data If the idle tim...

Page 8: ...tent HEX Command Description Host Slave 3A 00 00 00 4B The host queries the firmware version of the module Host Slave 3A 80 xx xx xx The module sends firmware version to the host Note Host Slave means...

Page 9: ...5 The module sends rainfall state to the host heavy rain 1 2 4 System State Detection Function The module will automatically monitor its system status during operation and if there is any abnormality...

Page 10: ...path asymmetry of the system caused by processing installation etc the module requires optical system calibration before use when installed to ensure the accuracy of rainfall detection For detailed co...

Page 11: ...ule to 1 Host Slave 3A 85 00 00 F1 The host sets the rainfall status output of the module to be disabled Host Slave 3A 05 00 00 24 The host reads the rainfall status output frequency from the module H...

Page 12: ...ost Host Slave 3A 86 xx xx xx The host sets light rain moderate rain threshold V2 of the module Host Slave 3A 87 xx xx xx The host reads light rain moderate rain threshold V2 from module Host Slave 3A...

Page 13: ...ents Host Slave 3A 8C xx xx xx The module sends to the host the threshold N1 for the number of times of heavy rain in 10 measurements Host Slave 3A 8D xx xx xx The host sets the module threshold N2 fo...

Page 14: ...The thresholds for light medium and heavy rain under different scenarios can be set as per actual requirements For example if you use a watering can to simulate rain detection it is recommended to us...

Page 15: ...the feedback value or vice versa Currently there is no correlation curve for light intensity vs feedback value Table 1 13 Ambient Light Mode Commands Command Direction Command Content HEX Command Desc...

Page 16: ...er sleep mode When the module enters the low power mode it will disable all rain detection functions and will only respond to specific wake up frame The relevant commands and descriptions are as shown...

Page 17: ...is shown in Table 2 1 Figure 2 1 Wire to Board Socket Table 2 1 Pin Definition NO Signal Name Function Remarks 1 VCC 3 3V Power Supply 2 UART_TX UART Receiving Connect to the pin TX of the host UART...

Page 18: ...t fix the module on the host mechanic structure with the front side the side with the IR emitter facing the glass then place the flexible transparent optical material on the front side of the module f...

Page 19: ...be adjusted appropriately For example if the glass thickness is 1 5 mm the thickness of the filled flexible transparent optical material should be 2 5 mm if the glass thickness is 2 0 mm the thickness...

Page 20: ...isfactory optical system calibration it means that the optical path asymmetry of the optical system is beyond the adjustable range due to the mechanical structure and installation accuracy which reduc...

Page 21: ...normally LEDA damaged If the read rainfall value is invalid LEDA may be damaged LEDB damaged If the read rainfall value is always 0 LEDB may be damaged Optical system calibration not good After calib...

Page 22: ...bient light varies much within the same period 4 Q4 What are the EMC and EMI levels of the module A4 ESD 8K temperature range 40 85 alternating humid heat 25 60 45 95 RH 5 Q5 What is the recommended t...

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