is a single byte check-sum of all of the characters in the.is the “end of transmission” marker and is the character 0x03.is the “start of transmission” marker and is the character 0x02.The format of the packet sent is as follows: The message is put in a simple “envelope”. In my weather station application, the communications is only one-way and so there is no mechanism for the receiver to re-request a garbled message the message is sent periodically with updated temperature and barometric pressure data. In this post I describe a simple protocol that provides error detection of the received message. by waving your fingers in front of the IR LEDs, bits will be dropped and the message received won’t match the message sent. The main issue with this code is that if the infrared beam is intermittently blocked during the transmission, e.g. In a previous post I had posted code that transmitted a message through an infrared link between two Arduinos.
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