I'm working with SIM 900 on Intel edison arduino expansion board.To enable the UART I'm running the script file which is pinned below.Sometimes it is enabling the UART and sometimes it is not.When I run the script file and UART is enabled the voltage at Rx and Tx pins are 5.0 V .But sometimes even though I run the script ,UART is not enabling ,then the voltages at Rx and Tx pins are 0 V and 5V respectively. What is the reason behind this?? Can you please let me know the way of enabling the UART when the script file runs.
Thanks and Regards,
Thank you for interest in the Intel® Edison Arduino Expansion Board.
I understand that you are experiencing issues related to the RX and TX pins when you run the attached script.
Thank you for sharing the script file.
Could you please share images of your setup?
Do you experience the same issue when running the script without the SIM900 module?
Can you send an image of the signal (an oscilloscope image, preferably) when you experience the issue?
Please check the following article, as it contains a series of guidelines on how to use modules based around a SIM900 (pages 160, 164, and 181):
I'll be waiting for your response.
I was wondering if you had the chance to check the previous message.
An image of your setup may help us find the reason why you are experiencing the issue.
If you have any other question or update, don't hesitate to contact us.
I am wondering about the values used with echo in your script.
Look at this:/thread/111658?start=15&tstart=0 https://communities.intel.com/thread/111658?start=15&tstart=0
The short story is I'm thinking we can't use 0 or 1, or low or high. Instead the only valid values are in or out.