AP Cisco AIR 1815i Error transforming image to express mobility

[walidit01]

Hello, 

I working to transform a Cisco AIR 1815i to express mobility using AIR-AP1830-K9-8.2.110.0.tar file, i used this command:

"ap-type mobility-express tftp://192.168.2.20/AIR-AP1830-K9-8.2.110.0.tar"

I'm getting this error:

#ap-type mobility-express tftp://192.168.2.20/AIR-AP1830-K9-8.2.110.0.tar
Starting the ME image download...
It may take a few minutes to finish download.
If it is longer, please abort command, check network connection and try again
######################################################################## 100.0%
Image transfer complete.
Image downloaded, writing to flash...
do CHECK_ME, part2 is active part
Image signing verify success.
Verify returns -3
upgrade.sh: btldr.bin signature verification failure, exit the script
Error: Image update failed.

this is my IOS version:

sh version:

"cisco AIR-AP1815I-E-K9 ARMv7 Processor rev 5 (v7l) with 1015920/803964K bytes of memory.
Processor board ID FCW2302N1BF
AP Running Image : 8.3.143.0
Primary Boot Image : 8.3.143.0
Backup Boot Image : 8.3.143.0
1 Gigabit Ethernet interfaces
2 802.11 Radios
Radio FW version : 9cef56836c2be4ced5dacbd94f6c28c0
NSS FW version : not available"

Thank you for your help !

[marce1000]

 - Check and or verify the md5sum of the original tar file.

 M.

[walidit01]

Dear @marce1000,

Thank you for your reply, how to check the md5sum, any command to perform from the console ?

[Sathiyanarayanan Ravindran]

Go to  http://www.winmd5.com/ and download the client to check Md5 or use online http://onlinemd5.com/ . 

Using the tool calculate the Md5 Value of the IOS downloaded and get the value of the MD5 on the Cisco download.

[walidit01]

Thank you very much for your help

[patoberli]

Please use 8.8.120.0 and not a ~4 year old image which has barely any Mobility Express functionality.

[walidit01]

Thank you @patoberli , 

I requested to the provider the latest IOS.