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by burespe1
Fri Mar 29, 2013 11:35 pm
Forum: Open Hardware
Topic: SIM900 GSM / GPRS Shield UART voltage levels
Replies: 4
Views: 27969

SIM900 GSM / GPRS Shield UART voltage levels

Hello,

I would like to use SIM900 GSM / GPRS Shield with Raspberry Pi (RPi) and communicate over serial interface UART. Voltage level of UART on RPi 3.3 VDC.

Could I connect RPi directly to SIM900 GSM / GPRS Shield? (I found out that you support UART of SIM900 that has a 2.8 VDC logic and I guess ...

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