Hi, I'm running into an issue with my SIM7000A. I'm using 3.7 V LiPo 3000 mAh battery and the polarity is correct. Solder connections look fine... Upon uploading LTE_Demo onto Arduino/resetting Arduino, very shortly after the shield powers off. Right about when the menu of options prints in the serial monitor is when the shield powers off. And upon turning it back on via the PWR button, I cannot find any network... Any advice? Thank you!
Also, I noticed there was a thread with a very similar issue to mine but I did not see any solution. Was wondering if anyone found a solution?
Modem basic test Initializing....(May take several seconds) Configuring to 9600 baud Attempting to open comm with ATs ---> AT <--- OK ---> ATE0 <--- OK ---> ATE0 <--- OK ---> AT+GMR <--- Revision:1351B03SIM7000A
---> AT+CPMS="SM","SM","SM" <--- +CPMS: 0,10,0,10,0,10 Modem is OK Found SIM7000 ---> AT+GSN <--- 865235030714519 Module IMEI: 865235030714519 ---> AT+CFUN=1 <--- OK ---> AT+CGDCONT=1,"IP","hologram" <--- ------------------------------------- [?] Print this menu [a] Read the ADC; 2.8V max for SIM800/808, 0V-VBAT for SIM7000 shield [b] Read supply voltage [C] Read the SIM CCID [u] Unlock SIM with PIN code [i] Read signal strength (RSSI) [n] Get network status  Get network connection info [c] Make phone Call [a] Get call status [h] Hang up phone [p] Pick up phone [N] Number of SMS's [r] Read SMS # [R] Read all SMS [d] Delete SMS # [D] Delete all SMS [s] Send SMS [u] Send USSD [y] Enable local time stamp (SIM800/808/70X0) [Y] Enable NTP time sync (SIM800/808/70X0) [t] Get network time [G] Enable cellular data [g] Disable cellular data [l] Query GSMLOC (2G) [w] Read webpage [W] Post to website  Post to dweet.io - 2G / LTE CAT-M / NB-IoT  Post to dweet.io - 3G / 4G LTE [O] Turn GPS on (SIM808/5320/7XX0) [o] Turn GPS off (SIM808/5320/7XX0) [L] Query GPS location (SIM808/5320/7XX0) [E] Raw NMEA out (SIM808) [s] Create serial passthru tunnel -------------------------------------
Modem> RDY +CFUN: 1
SMS Ready n ---> AT+CGREG? <--- AT+CGREG? Network status 0: Not registered +CGREG: 0,5Modem>
OK G ---> AT+CIPSHUT <--- AT+CIPSHUT ---> AT+CGATT=1 <--- AT+CGATT=1 Failed to turn on OK Modem> Hi, thanks for getting back to me and sorry for the late reply.
This is the serial monitor upon uploading LTE_Demo. As it shows, right about when it reads the IMEI of the shield, the shield powers off (LED light turns off). Then after a few seconds, the menu prints out. As you can also see, I tried pressing [n], getting network status, but it cannot find a network and also [G], and could not turn on LTE.
Hmmm that is strange that it wouldn't get past the menu while staying powered on. Have you tried powering it on without connecting it to the Arduino? Connect only the battery to it, then press and hold the PWR button for a couple seconds and let go, and see if it powers on and stays on without doing anything.