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Questions tagged [max232]

An IC that converts signals from an RS-232 serial port to signals suitable for use in TTL compatible digital logic circuits.

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Arduino as Modbus RS485 slave using only 2 Digital pins

I want to use RX(0) and TX(1) Pins to make Arduino as an RS485 slave. To do this I am using MAX485 IC (Breakout board) https://datasheets.maximintegrated.com/en/ds/MAX1487-MAX491.pdf The problem here ...
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MAX232 chip fails to initialize properly with arduino

I have connected a MAX232 chip for RS232 communication with my Arduino. The chip input is connected to Arduino Tx and it is getting power from external 3.3 volt dc power source. My Arduino is also ...
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How do I Continuity Test/Troubleshoot a Linksprite RS232 V2 Shield?

I have a Linksprite RS232 v2 adapter (which uses a MAX232 chip), as per this image. I have soldered on the headers and tested the pins to make sure there are no solder bridges. I have set the jumpers ...
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Can't get values of max232 with loopback

I didn't find answers which solves my problem with the max232 yet. I connected it like this to my Arduino uno, so my Arduino provides the +5V VCC and the ground: max232 connection The only thing what ...
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352 views

GSM Modem with MAX232 to Arduino Serial?

I have GSM modem that has MAX232 interface for RX/TX/GND on three pins. Is it possible to interface Arduino in some way? Tnx for help.