|
|
Post by jtrtexas on Jul 1, 2022 14:11:00 GMT
Hello thread, I am having some issues getting the botletics sim7000a to even turn on when using the Arduino Uno R3. First of all, there are clearance issues. The 3 little silver things on the back of the shield are clashing with the r3 rectangular channel, I believe this is causing an bad connection and not allowing the shield to turn on. So I went and got some extender pins for the uno, still no luck. Is there anything else I should be doing? Is this something that can be solved by soldering the pins? Is the 7000a even compatable to work with an Uno r3? Thanks for the help, it is greatly appreciated.
|
|
|
|
Post by Botletics on Jul 1, 2022 15:14:27 GMT
Hi there! There shouldn't be any clearance issue with the stacking headers provided. Please make sure you're following the instructions for assembly here. Also, please note that you will need a 3.7V LiPo battery (1000mAH capacity or larger is recommended) connected to the shield for it to power on properly. Please also make sure that the polarity of the battery is correct, as many vendors reverse the wires. The red wire should be on the left side of the connector when you plug it into the shield. Adafruit and Sparkfun both use the correct polarity. |
|
|
|
Post by zach1490 on Jul 25, 2022 1:09:54 GMT
I’m having a similar issue. I have verified the solder connections with a continuity check. Also, switch the polarity of battery and checked the output voltage. I have gotten the GPS portion to work, but once I start to use the cellular functions the power turns off for the module. Also, had a power supply hooked up to the module at one point.
|
|
|
|
Post by Botletics on Jul 25, 2022 1:19:33 GMT
To test, don't use a power supply and only have the battery connected. Then power it on with the pushbutton and run AT commands via USB. When you say it powers off, do you mean the green "PWR" LED actually turns off? Or does the module just not seem to respond to AT commands?
|
|
|
|
Post by zach1490 on Jul 25, 2022 1:31:54 GMT
The "PWR" LED turns off. It will respond to commands when the LED is on, but when it gets to the cellular commands the "PWR" LED turns off.
|
|
|
|
Post by Botletics on Jul 25, 2022 1:38:32 GMT
What capacity is your LiPo battery? You mentioned you swapped the polarity. Did you plug it in with the wrong polarity at first?
|
|
|
|
Post by zach1490 on Jul 25, 2022 1:42:24 GMT
AKZYTUE 3.7V 1500mAh 703462 Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector. Yes, at first I plugged it in with the wrong polarity.
|
|
|
|
Post by Botletics on Jul 25, 2022 1:46:50 GMT
Could you please post a screenshot of the AT commands you're running?
|
|
|
|
Post by zach1490 on Jul 25, 2022 1:52:50 GMT
I'm running the LTE Demo right now. Sometimes the PWR LED will remain on, other times it turns off.
FONA> FONA basic test
Initializing....(May take several seconds)
Configuring to 9600 baud
Attempting to open comm with ATs
---> AT
<---
---> AT
<---
---> AT ---------------------------
<---
---> AT
<---
---> AT
<---
---> AT
<---
---> AT
<---
---> AT ---------------------------- I think the PWR LED turns off around this area.
<--- AT
---> ATE0
<--- ATE0
---> ATE0
<--- OK
---> AT+GMR
<--- Revision:1351B03SIM7000A
OK
---> AT+CPMS="SM","SM","SM"
<--- +CPMS: 0,10,0,10,0,10
FONA is OK
Found SIM7000
---> AT+GSN
<--- 865235030718890
Module IMEI: 865235030718890
---> AT+CFUN=1
<---
---> AT+CGDCONT=1,"IP","hologram"
<---
|
|
|
|
Post by Botletics on Jul 25, 2022 1:54:59 GMT
Hmmm that's strange. Have you tried another battery?
|
|
|
|
Post by zach1490 on Jul 25, 2022 2:02:47 GMT
I can give that try. Currently don't have an extra battery on me at the moment
|
|
|
|
Post by Botletics on Jul 25, 2022 2:14:11 GMT
OK, sorry to make you go through the trouble. Some batteries are just faulty. It's unlikely that the SIM7000 is fried from reverse polarity if it's still responding in some way.
|
|
|
|
Post by zach1490 on Jul 28, 2022 1:02:05 GMT
Tried a higher capacity battery. Still the same result.
|
|
|
|
Post by zach1490 on Jul 28, 2022 1:30:25 GMT
So the issue still happens whenenever I try to do anything cellular. The power led was on until I tried "Enable cellular data" in the LTE Demo.
FONA> a
---> AT+CADC?
<--- +CADC: 1,1153
ADC = 1153 mV
FONA> i
---> AT+CSQ
<--- +CSQ: 23,99
RSSI = 23: -68 dBm
FONA> i
---> AT+CSQ
<--- +CSQ: 23,99
RSSI = 23: -68 dBm
FONA> G
---> AT+CIPSHUT
<--- SHUT OK
---> AT+CGATT=1
<--- ERROR
Failed to turn on
FONA> i
---> AT+CSQ
<---
RSSI = 0: -115 dBm
FONA>
|
|
|
|
Post by Botletics on Jul 28, 2022 13:25:14 GMT
Hmmm that's very strange, I've never seen that happen. Perhaps reverse polarity damaged it in some way... It seems unlikely though, if it's still responding to commands. Is this with GPS on? It shouldn't matter, but try cellular data with GPS off.
|
|
