Home › Forums › Mayfly Data Logger › Mayfly RS232 Compatability (TTL to RS232 adapter?) › Reply To: Mayfly RS232 Compatability (TTL to RS232 adapter?)
There are several different ways you can approach this. The easiest option is to use a Max232 chip like the one you mentioned from Sparkfun (https://www.sparkfun.com/products/11189). If your sensor has a DB-9 connector on the end rather than bare wires, you can use one of these:
There are other ways to do it with discrete components like what Jim mentioned or other more complicated options, but most people will find the the converters listed above will meet their needs. You could use a Grove-to-header cable (http://www.robotshop.com/en/grove-4-pin-female-jumper-wire.html) to connect the Mayfly to the converter.