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loki28
loki28
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I have arduino nano and sim900a modem. My arduino pinout

SIM900A Modem

Modem Backside

Rx(pin30) and Tx(pin31) pins of arduino shows 3.8VDC respectively and Rx and Tx of SIM900a shows 3.6VDC and 2.8VDC respectively. Could i connect the SIM900a modem directly to the arduino? Since Should i use level shifter between arduino TX(3.8v) and SIM900A modem(3.6v)? Any suggestions?

Thanks..

I have arduino nano and sim900a modem. My arduino pinout

SIM900A Modem

Rx(pin30) and Tx(pin31) pins of arduino shows 3.8VDC respectively and Rx and Tx of SIM900a shows 3.6VDC and 2.8VDC respectively. Could i connect the SIM900a modem directly to the arduino? Since Should i use level shifter between arduino TX(3.8v) and SIM900A modem(3.6v)? Any suggestions?

Thanks..

I have arduino nano and sim900a modem. My arduino pinout

SIM900A Modem

Modem Backside

Rx(pin30) and Tx(pin31) pins of arduino shows 3.8VDC respectively and Rx and Tx of SIM900a shows 3.6VDC and 2.8VDC respectively. Could i connect the SIM900a modem directly to the arduino? Since Should i use level shifter between arduino TX(3.8v) and SIM900A modem(3.6v)? Any suggestions?

Thanks..

Source Link
loki28
loki28
  • 23
  • 1
  • 4

How to interface arduino nano with sim900A?

I have arduino nano and sim900a modem. My arduino pinout

SIM900A Modem

Rx(pin30) and Tx(pin31) pins of arduino shows 3.8VDC respectively and Rx and Tx of SIM900a shows 3.6VDC and 2.8VDC respectively. Could i connect the SIM900a modem directly to the arduino? Since Should i use level shifter between arduino TX(3.8v) and SIM900A modem(3.6v)? Any suggestions?

Thanks..