Hi:
I don’t know if it is the correct place for issue tracking. I just upgrade the firmware and found the lte band settings value “0” and “40000000” lost the original meaning. the original meaning is “no change”, the new meaning is “zero”.
I think maybe quectel should define consistent number/character for the meaning of “zero” and “no change”. use “0” for the “no change” meaning is not a smart idea. AT command sequence to show bugs below:
ati
Quectel
EC20F
Revision: EC20CEFASGR08A02M2G
OK
AT+QPRTPARA=3
OK
AT+CFUN=1,1
OK
+QIND: PB DONE
at+qcfg=“band”
+QCFG: “band”,0x493,0x1e200000095,0x21
OK
at+qcfg=“band”,0,0,0,1
OK
at+qcfg=“band”
+QCFG: “band”,0x493,0x0,0x21
OK
at+qcfg=“band”,493,1e200000095,21,1
OK
at+qcfg=“band”
+QCFG: “band”,0x493,0x1e200000095,0x21
OK
at+qcfg=“band”,0,40000000,40000000,1
OK
at+qcfg=“band”
+QCFG: “band”,0x493,0x0,0x21
OK