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Russian symbols in ESPA connector
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October 19, 2021
3:14 pm

Thanks, Henk. Understood. I'll look at the fire alarm

October 19, 2021
3:04 pm
Henk Helmantel
Forum Posts: 1499
Member Since:
May 28, 2013
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Hello Andrey,

The ESPA protocol uses a 7-bit character set that does not include Russian characters. In the specifications the character set is specified as IA5.

By itself, the Russian characters should not cause a checksum error, only a garbled message. So I suspect that the fire alarm system does not encode the ESPA data block correctly (with a wrong checksum value) when the message contains Russian characters.

Regards, Henk

October 18, 2021
4:30 pm

We are testing a bunch of Fire alarm ESPA GSM SMS.
If a fire detector has Russian characters in its name, we get an error:
Checksum error in ESPA 4.4.4 data block: 11892133762722Fire Fault ??? 2 32435263?
If the name is in English characters, then everything is fine:
Status: 200, Success: Message accepted by GSM modem gateway. Message: Fire Fault Opt_det 2

What could be the problem? Russian language support missing in Diafaan SMS Server or fire alarm?


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