Hello,
I am struggling to connect the SyScroll 20-30 Air EVO air pump.
The manual is not clear on which connector the modbus is accessible, I tried the RJ41 and I am getting the below data on logger:
Docklight Log File (HEX) - Started 5/1/2024 14:42:35.465
5/1/2024 14:42:28.549 [RX] - F5 F5
5/1/2024 14:42:28.580 [RX] - 55 FE FF 55 FF FD F5 FF 55 FF
5/1/2024 14:42:28.660 [RX] - 5F 00 55 FF FF 55 FF F5 28 00 FF FD
5/1/2024 14:42:28.740 [RX] - 40 55 E5 FF 58 00 FE
5/1/2024 14:42:28.781 [RX] - 21 00 F8 08 00 FE 61 00 FA 00 00 FF 03 00 FA FD
5/1/2024 14:42:28.851 [RX] - 02 00 F8
5/1/2024 14:42:30.868 [RX] - F5 FF FF FF 55 FE FD FF FF 40 55 F5
5/1/2024 14:42:30.939 [RX] - 55 FF FF 5F 15 FD
5/1/2024 14:42:31.009 [RX] - 40 55 E5 28 00 FF
5/1/2024 14:42:31.039 [RX] - 40 55 A5 08 00 FE FF
5/1/2024 14:42:31.080 [RX] - 5D 00 FF E1 08 50 FF 40 00 FA 03 40 FA FF
5/1/2024 14:42:31.170 [RX] - 55 00 F8
5/1/2024 14:42:33.198 [RX] - 01 FF
5/1/2024 14:42:33.218 [RX] - 40 55 D5 FF FF FD FF FF 55 55 FF
5/1/2024 14:42:33.319 [RX] - FF F5 F5 68 00 FF F5 FF 08 00 FF 40 55 A5 FF
5/1/2024 14:42:33.419 [RX] - 22 00 F8 21 00 F8
5/1/2024 14:42:33.449 [RX] - 42 00 FA 03 00 FA 54 00 FE 00 00 FE 01 00 F8
5/1/2024 14:42:35.506 [RX] - FF F5 FF FF FD FF 55 FF FF
5/1/2024 14:42:35.597 [RX] - 55 FF 55 F8
5/1/2024 14:42:35.628 [RX] - FF F5 FF 28 00 FE 28 00 FE 28 00 FF
5/1/2024 14:42:35.697 [RX] - 40 FA FD 5C 00 FE 58 00 FF 23 00 FA 61 00 F8 21 00 FA 03 00 FA 03 00 FA
5/1/2024 14:42:35.807 [RX] - 01 00 F8 00
I am attaching some photos from the PCB
I measured with multimeter and seems that the signals from RJ41 are the same as the 3x1 screw terminal connector. It seems that on these signals it reports some data but its not modbus.
I found 2 ICs that are related to RS485 but I did not check if the 4x1 screw terminal connector is related to modbus.
Does anyone have any idea?