I'm trying to use Modbusino in attiny402 project. It consists of several slaves controlled by (for now) a PC master.
Everything works fine when tere is only one slave on the bus and it is addressed. Issue atarts when I try to provide (on purpose) wrong, non-existing slave ID. Then non addressed slave send some weird response.
Sample request: [20][03][00][00][00][0A][C3][7C].
Sample (wrong) answer from slave: [21][80][01][81][CA][21][8A][01][87][6A] (sometimes only one or two bytes as response).
Clearly visible that request was sent to ID 0x20 and response comes from ID 0x21 (an error to function 00...).
I saw previous issue #7 - I already use patched version.
Arduino 1.8.19, target IC attiny402/804.
RS485 biased and terminators at both ends.
BTW, I already changed to _MODBUSINO_RTU_MAX_ADU_LENGTH 30 as tiny402 has 256B (I only need 10 registers) of RAM and declared req[_MODBUSINO_RTU_MAX_ADU_LENGTH] as static, otherwise I had memory leaks and some random data sent.
What can be an issue? May it be a memory leakage somewhere else due to really small RAM resources?
Hello,
I'm trying to use Modbusino in attiny402 project. It consists of several slaves controlled by (for now) a PC master. Everything works fine when tere is only one slave on the bus and it is addressed. Issue atarts when I try to provide (on purpose) wrong, non-existing slave ID. Then non addressed slave send some weird response. Sample request:
[20][03][00][00][00][0A][C3][7C]. Sample (wrong) answer from slave:[21][80][01][81][CA][21][8A][01][87][6A](sometimes only one or two bytes as response). Clearly visible that request was sent to ID 0x20 and response comes from ID 0x21 (an error to function 00...).I saw previous issue #7 - I already use patched version.
Arduino 1.8.19, target IC attiny402/804. RS485 biased and terminators at both ends.
BTW, I already changed to
_MODBUSINO_RTU_MAX_ADU_LENGTH 30as tiny402 has 256B (I only need 10 registers) of RAM and declaredreq[_MODBUSINO_RTU_MAX_ADU_LENGTH]as static, otherwise I had memory leaks and some random data sent.What can be an issue? May it be a memory leakage somewhere else due to really small RAM resources?
Regards