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Seeed-Studio / GPRS_Shield_Suli

GPRS Shield based on SIM900
http://www.seeedstudio.com/depot/GPRS-Shield-V20-p-1379.html?cPath=19_20
MIT License
48 stars 40 forks source link

Send SMS example not working #12

Open Mrfixit44 opened 9 years ago

Mrfixit44 commented 9 years ago

Hello, I'm new to this, I have a v2 of the GPRS shield. The Shield works with the serial example on the Wiki page so the board works and so does the SIM card. I installed the library. open up the Send SMS example, and change the number. This is where things get a little weird. I upload the sketch, with the modem off power up then turn on the modem and wait for the green light to blink once every 3 seconds. Then open the Arduino serial monitor and get the message

init error

If I power off the modem with the Arduino serial monitor still open it will say

gprs init success start to send message..

and nothing happens.

suggestions? Thanks, J

kenken64 commented 5 years ago

Same here ...

lanselambor commented 5 years ago

Generally message sending should wait for network being registered.