maranet 1.0

Mara network protocol

Mara is a protocol designed for interaction with a network of embedded devices. These devices collect state and events from a process (implementations include traffic light systems and power station monitoring).

Mara 1.0 is source code is implemented on top of Microchip PIC devices and code can be requested at ricadoalopez at gmail.

Mara 1.6, designed with 16 bit in mind, is implemented on top of Arduino libraries and should be available soon.

Mara 1.0

Mara packages structure:

┌─────┬─────┬─────┬─────┬─────┬─────┬─────┐┌─────┐┌─────┬─────┐
│ SOF │ SEQ │ QTY │ SRC │ DST │ CMD │ PLD ││ ... ││ BCL │ BCH │
│     │     │     │     │     │     │     ││     ││     │     │
└─────┴─────┴─────┴─────┴─────┴─────┴─────┘└─────┘└─────┴─────┘
┌─────┬───────────┬───────────┬─────┬───────────┬───────────┐
│ QSV │ SV0       │ SV1       │ QDI │ DI0       │ DI1       │
│     │           │           │     │           │           │
└─────┴───────────┴───────────┴─────┴───────────┴───────────┘
┌─────┬───────────┬───────────┬─────┬─────────────────────────┐
│ QAI │ AI0       │ AI1       │ QEV │ EV..                    .
│     │           │           │     │                         │
└─────┴───────────┴───────────┴─────┴─────────────────────────┘

Where:

• SOF Start of frame

• SEQ Sequence number

• QTY Frame length or byte quantity

• SRC Source address

• DST Destination address

• CMD Command

• PLD Payload

  • Payload consists of arrays of values