We notice, that after freshly booting our HL7692 module (has RHL769x.2.23.172400.201706231140.x7120m_1 firmware, that it came with), often (maybe 3 times in 5), 2G
AT+WMRXPOWER commands fail. On the other two boots, the exact same commands, work fine. Here’s some example commands, when they work:
AT+WMRXPOWER=1,900,62,-109 +WMRXPOWER: -84.4 OK AT+WMRXPOWER=1,1800,699,-108 +WMRXPOWER: -85.6 OK
And here’s the same commands, when they don’t:
AT+WMRXPOWER=1,900,62,-109 ERROR AT+WMRXPOWER=1,1800,699,-108 ERROR
Is this all a bug perhaps, with the 2.23 firmware ? A known one ? That is fixed in a later firmware version ? We see the latest presently is 2.27. The 2.27 release note makes no mention of the
AT+WMRXPOWER command. But what about other firmware versions, between 2.23 and 2.27 ? They are not available on the Sierra website, nor their releases notes. So who knows ?
If a bug with 2.23 firmware, is there some workaround ? We’ve tried, prior to issuing our first
AT+WMRXPOWER command, the following, none worked: 1) Issuing a
AT+WMRXPOWER=0 command. 2) Issuing a
AT+WMTXPOWER=0 command. 3) Issuing both. 4) Issuing an
ATI command. 5) Issuing an
AT command. 6) Issuing just a carriage return.