sen0604 address change
luk.fox 2024-12-16 20:46:58 894 Views3 Replies Hi there is no documentation regarding address update of SEN0604/SEN0601/SEN0602.
What frame structure is needed for function code 6 ?
And how to calculate CRC ( if needed to be added in the end )with which seed ?
Basically I wan to connect all the above mentioned sensors on one bus and that's why I need to change address of the sensors.
Thanks a lot for your reply in advance!
| Slave Address | Function Code | Register Address | Data | CRC |
Format ^^
| 0x01 | 0x06 | 0x07 0xd0 | 0x00 0x03 | 0xA0 0xB1 |
Slave Address = 1 (default address)
Function Code = 6
Register Address = 0x07d0
new address = 0x0003
CRC = calculated from below function appended as followed
// ComWriteAdress[6] = (crc & 0xff00) >> 8;
// ComWriteAdress[7] = (crc & 0x00ff);
code for CRC from the example
unsigned int CRC16_2(unsigned char *buf, int len)
{
unsigned int crc = 0xFFFF;
for (int pos = 0; pos < len; pos++)
{
crc ^= (unsigned int)buf[pos];
for (int i = 8; i != 0; i--)
{
if ((crc & 0x0001) != 0)
{
crc >>= 1;
crc ^= 0xA001;
}
else
{
crc >>= 1;
}
}
}
Solved by my self
luk.fox 0x7d0 is the R/W location which can be updated , I need to know the frame for format for that
luk.fox I cannot see any way to change the address.
https://wiki.dfrobot.com/RS485_Soil_Sensor_Temperature_Humidity_EC_PH_SKU_SEN0604
Let's see what dfrobot has to say.
lia.ifat 
