Byte by byte...

teganburns

I believe i made a post on this wifi module before, but was unable to find it even through my quick links.

Im working on coms /w the propeller and a wifi module and i have almost every byte down except the 5th byte (CHK).

below is the interaction between the module and my computer (ignore the first tx, its the reset packet that sends automatically)

All bytes are explained here, go to page 32 under serial protocal http://www.thaieasyelec.net/archives/Manual/LinkSprite-UART-WiFi.pdf

but due to the,what i believe, English translation error i don't know what the fifth byte is...

Thank you in advance to any one who dares to try and decode this


1================
[TX]
aa 87 00 03 d7 05 00 18 00 00 00 00 00 00 'Rest packet sent automaticly
[TX]
aa 88 00 04 94 00 ff 3f b4 00 00 00 00 00 00 'Scan for local ssid
[RX]
aa 28 00 00 90 00 00 00 00 00 00 'recive ACK packet
[RX]
aa 01 00 01 41 40 00 00 00 00 00 00 'no local wifi (removed the antenna so it wouldn't pick up anything to reduce the number of bytes recived)
=====================


2======================
[TX]
aa 89 00 04 44 00 ff 3f b4 00 00 00 00 00 00 'Again scan
[RX]
aa 29 00 00 40 00 00 00 00 00 00 ' ACK
[RX]
aa 02 00 01 f0 40 00 00 00 00 00 00 'no data recived
======================


3====================
[TX]
aa 8a 00 04 f5 00 ff 3f b4 00 00 00 00 00 00
[RX]
aa 2a 00 00 f1 00 00 00 00 00 00
[RX]
aa 03 00 01 20 40 00 00 00 00 00 00
=======================


4===========================
[TX]
aa 8b 00 04 25 00 ff 3f b4 00 00 00 00 00 00
[RX]
aa 2b 00 00 21 00 00 00 00 00 00
[RX]
aa 04 00 01 53 40 00 00 00 00 00 00
===================================


5===========================
[TX]
aa 8c 00 04 56 00 ff 3f b4 00 00 00 00 00 00
[RX]
aa 2c 00 00 52 00 00 00 00 00 00
[RX]
aa 05 00 01 83 40 00 00 00 00 00 00
===============================

feng

https://www.google.se/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=rja&sqi=2&ved=0CE4QFjAF&url=http%3A%2F%2Fwww.filetxt.net%2Ftxt%2F4c75560ah32i0&ei=DzthUdLBI8i84AS61IDYBA&usg=AFQjCNGyR-FwCZCY0xhOOu62tO27-lp1fw
Page 32/33

teganburns

feng wrote: »

https://www.google.se/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=rja&sqi=2&ved=0CE4QFjAF&url=http%3A%2F%2Fwww.filetxt.net%2Ftxt%2F4c75560ah32i0&ei=DzthUdLBI8i84AS61IDYBA&usg=AFQjCNGyR-FwCZCY0xhOOu62tO27-lp1fw
Page 32/33

Same thing that I posted

kwinn

The manual says it is "Frame Head Verification field. It is sum of the CRC of the CTL field and the LENGTH field.", however it is not clear what crc calculation is used, if the crc is calculated on each field and added, or the fields are added and the crc then calculated. You need to contact the manufacturer for clarification.

teganburns

Yeah i have emailed liksprite a few times and did not get any response. I also checked out the link for forums but i believe the host kicked them. I bought through robotshop so ill try and contact them too.