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GSM/GPRS module AT Commands on RTOS

Nandini Sultanpure

Hello, I have started working on ac30m1x64 micro-controller. I have successfully interfaced GSM/GPRS module serially(I2C) and getting acknowledgements for all the AT Commands. I have migrated the same code on CMSIS-RTX(RTOS),but, I cannot see any acknowledgements from the GSM/GPRS(slave) module. I have used RTOS TIMER, osDELAY()function and many more for trial and error. Though failed to get reply from the slave. I cannot even see the "AT= OK" from the slave, I am completely stuck. Please can anyone help me through this?

Thanks,

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