TuyaReceive not work some payload

[pptp-plg]

PROBLEM DESCRIPTION

TuyaReceive not work message
0x55 0xAA 0x03 0x07 0x00 0x08 0x02 0x02 0x00 0x04 0x00 0x00 0x55 0xDD 0x4B

I think this overflow or checksum calculate incorrect.

REQUESTED INFORMATION

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• Device used (e.g., Sonoff Basic): Tuya mcu
• Tasmota binary firmware version number used: 13.2.0
  • [x ] Pre-compiled
  • Self-compiled
• [ x] Flashing tools used: tas
• Provide the output of command: Backlog Template; Module; GPIO 255:

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TO REPRODUCE

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EXPECTED BEHAVIOUR

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ADDITIONAL CONTEXT

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[Jason2866]

Please add more Infos. Which Device? What have you tried?

[pptp-plg]

micro solar inverter device.
and I try to send by manual use usb serial it not work. but other payload work fine

0x55 0xAA 0x03 0x07 0x00 0x08 0x66 0x02 0x00 0x04 0x00 0x00 0x00 0x00 0x7D

[pptp-plg]

I try to decrease value data on payload proplem
0x55AA0307000802020004000055DD4B
to
0x55AA03070008020200040000454DAB
it work.
Last data can is 21759 (0x54FF).

[pptp-plg]

I found bug if payload have 0x55 in some byte tuyamcu work incorrect

[pptp-plg]

standard Tasmota 13.2.0

[barbudor]

Please test this new binary and report your results
removed outdated test binary

Change are here and will be pushed to Tasmota depending on tests results (yours and more)

[pptp-plg]

It not work can be test by payload
0x55AA0307000802020004000055DD4B
and
0x55AA03070008020200040000454DAB

[barbudor]

Please test this version
test tuya.zip

Looks good to me:
with 55 AA 03 55 00 0A 55 AA 55 AA 55 AA 55 AA 55 AA 5C:

15:44:43.239 {"TuyaReceived":{"Data":"55AA0355000A55AA55AA55AA55AA55AA5C","Cmnd":85,"CmndData":"55AA55AA55AA55AA55AA"}}
15:44:43.241 TYA: RX unknown command

with 55 AA 03 55 00 0C 55 AA 55 AA 55 00 AA 55 00 55 AA 00 B4:

15:45:39.852 {"TuyaReceived":{"Data":"55AA0355000C55AA55AA5500AA550055AA00B4","Cmnd":85,"CmndData":"55AA55AA5500AA550055AA00"}}
15:45:39.854 TYA: RX unknown command

Commands are meaningless but they are received properly

[barbudor]

And with your own examples:

16:05:37.066 {"TuyaReceived":{"Data":"55AA0307000802020004000055DD4B","Cmnd":7,"CmndData":"02020004000055DD","DpType2Id2":21981,"2":{"DpId":2,"DpIdType":2,"DpIdData":"000055DD"}}}
16:05:37.069 TYA: fnId=0 is set for dpId=2
16:05:37.071 TYA: RX value 21981 from dpId 2 
16:05:38.908 TYA: Send "55aa00000000ff"
16:05:44.643 {"TuyaReceived":{"Data":"55AA03070008020200040000454DAB","Cmnd":7,"CmndData":"020200040000454D","DpType2Id2":17741,"2":{"DpId":2,"DpIdType":2,"DpIdData":"0000454D"}}}
16:05:44.648 TYA: fnId=0 is set for dpId=2
16:05:44.650 TYA: RX value 17741 from dpId 2 

[barbudor]

Does it work ?
Without proper confirmation from your side, the fix will NOT be added to tasmota

[pptp-plg]

It work.