More Teckin SP27 (UK) woes

Having sucessfully flashed some Teckin SP23s I bought a 4-pack of Teckin SP27s from Amazon.co.uk only to find that I can’t flash them with tuya-convert 😦

I then found issue #364 (wish I’d spotted that before purchasing them) which seems to imply that these are just not usable.

Before I return them, I thought it might be worthwhile getting some more logs and info just in case it’s a tweak to tuya-convert rather than a total fail.

Running tuya-convert, connecting a phone to the vtrust-flash AP and putting the Teckin into fast flash mode, I see the Teckin device get an IP allocated of 10.42.42.25 and it then broadcasts the following (captured with tcpdump -Xi wlan0 host 10.42.42.25):

09:02:33.776804 IP 10.42.42.25.49153 > 255.255.255.255.6667: UDP, length 172
        0x0000:  4500 00c8 0085 0000 ff11 865d 0a2a 2a19  E..........].**.
        0x0010:  ffff ffff c001 1a0b 00b4 a492 0000 55aa  ..............U.
        0x0020:  0000 0000 0000 0013 0000 009c 0000 0000  ................
        0x0030:  10ed e970 7e01 3aeb 94bb de01 6e18 38f8  ...p~.:.....n.8.
        0x0040:  d467 ca3a 334f 9dca aac2 75e2 a79d 451b  .g.:3O....u...E.
        0x0050:  4fdf f322 cc82 6461 a758 a161 8fce cd44  O.."..da.X.a...D
        0x0060:  09e2 035b 9c3e 1f16 19a8 8a35 3807 ed7f  ...[.>.....58...
        0x0070:  78da 9734 8091 5c56 bcd9 9fad 5a2f 88fa  x..4..\V....Z/..
        0x0080:  379e 7d68 a024 5626 9f46 1638 8e2a a04e  7.}h.$V&.F.8.*.N
        0x0090:  e667 ea0b 8f32 428e 7df4 72c4 054e ebe7  .g...2B.}.r..N..
        0x00a0:  fb79 4453 4fe5 989a 0c5b b393 4c9a c717  .yDSO....[..L...
        0x00b0:  3843 63dc d0f0 705a e4ca c595 bbf4 9625  8Cc...pZ.......%
        0x00c0:  6b1d d410 0000 aa55                      k......U

I’m guessing that tuya-convert doesn’t like this as smarthack-web.log says:

POST /d.json?a=tuya.device.config.get&et=1&other={"token":"00000000","region":"US"}&t=33&uuid=f0e10c184d9bd602&v=4.1&sign=e6257aa1e77f698e88d55f6907aedd4d
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Content-Length: 37
Host: a2.tuyaus.com
User-Agent: TUYA_IOT_SDK

payload 828653B6FFCAF268236DA6F62A762388
WARNING: it appears this device does not use an ESP82xx and therefore cannot install ESP based firmware
Answer tuya.device.dynamic.config.get
reply {"t":1573722052,"result":"DE5Knn9Cb3cqQPnnXE9wpt7q16ainqYPbWmWbMDljc/I8vUuAf86Ii7sZGk/V+R5cQF6B49KpXabHHGS1cxvxKqlAzvTue0k7+0uTuyd/yk+imXSpMR9ocIGrNaUeSSf","sign":"f96e9ba7d689a2d3"}
ESC[32m[I 191114 09:00:52 web:2246]ESC[m^O 200 POST /d.json?a=tuya.device.config.get&et=1&other={"token":"00000000","region":"US"}&t=33&uuid=f0e10c184d9bd602&v=4.1&sign=e6257aa1e77f698e88d55f6907aedd4d (10.42.42.1) 60.21ms

Are these really not ESP82XX based or are they some variant that’s not recognised? Taking one apart to look at the chip means breaking the glued-on casing which, as I have a 4-pack, I’m kind of reluctant to do as I won’t be able to return them.

Here are the log files.

smarthack-web.log smarthack-mqtt.log smarthack-udp.log smarthack-psk.log smarthack-wifi.log

Happy to grab more logs and try stuff if it helps.

[jmcharg]

Sorry to say I have just taken delivery of a pair of B07PH28N1D and they wont flash. So guessing they have the new chip in them as well now., They will be going back to Amazon this morning!

[Rustymage]

As of today, the order I recieved of B07QN5XY89 from Amazon do not flash.

WARNING: it appears this device does not use an ESP82xx and therefore cannot install ESP based firmware