search

reaper7 / SDM_Energy_Meter

reading SDM72 SDM120 SDM220 SDM230 SDM630 modbus energy meters from arduino (esp8266, esp32, avr)
247 stars 97 forks source link

CRC ISSUE? #59

Closed jayvdw13 closed 2 years ago

jayvdw13 commented 2 years ago

i keep getting error 4 but i know for sure i have connected everything correctly.
04 00 06 00 02 91 CA 01 04 00 0C 00 02 B1 C8 01 04 00 46 00 02 90 1E 01 04 00 00 00 02 71 CB 01 04 00 06 00 02 91 CA 01 04 00 0C 00 02 B1 C8 01 04 00 46 00 02 90 1E 01 04 00 00 00 02 71 CB 01 04 00 06 00 02 91 CA 01 04 00 0C 00 02 B1 C8 this is the data that gets sent by the esp to the sdm i checked this using commix 1.4 and a usb-rs485 the only problem is that i dont get any response from the sdm. when i disconnect the esp from the usb converter i can send data to the sdm directly i send this: 01 04 00 00 00 02 71 CB which is a voltage request. i get an immediate response but only when i turn of crc image here is a screenshot of the programm is use and the response i get. image and here is a screenshot of what happens when i enable crc again. image and this is what i get when i connect the esp again. can anyone tell me what i am doing wrong the esp i am using is a ESP32-WROVER-E and the converter that i use is a MAX485 TTL Thanks in advance.