Slow +PBREADY and low signal strength | Thales IoT Developer Community
January 6, 2015 - 7:01pm, 6174 views
When my EHS6 starts up it takes a long time for +PBREADY to appear: 30 to 180+ seconds. What could cause this? Sometimes +PBREADY never comes and I have to reset the ****m. AT+CPIN always returns ERROR before +PBREADY arrives (which is expected I guess).
Also my signal strength (AT+CSQ) is always quite low (CSQ 3 - 7) even thought I have used a good antenna that gives good signal on other equipment. Form the ****m I have a short (2mm) antenna track to a UFL connector. I have treied to match the track for 50 ohm impedance as best I could. When in the **** above where +PBREADY does not arrive the response to AT+CSQ is "+CSQ: 99,99".
I have my scope triggered to tell me if the 4V supply to the ****m dips below 3.8V but it never does so I don't think it is power supply related.
Any thoughts much appreciated?