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| Obviously there would be firmware changes required to control the DS2408's. Is this feasible as a development project? |
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Obviously there would be firmware changes required to control the DS2408's. Is this feasible as a development project?
Like outputting a certain XX YY ZZ <NN> CRC (...whatever) sequence on 2nd serial port when output_channel= ... range is configured ** maybe you already have a sequence in mind ? * actually VEMS round is already configurable as IO-extender, PWM output * of course feasible, but one-wire might not be the best solution for this * RS485 is more noise-tolerant than CAN (which can be seen from the higher range: RS485 upto 1200m) and throughput definitely high enough for IO-extender ** there are even well-established modbus-commands for this (even v3 firmware implements some, though not yet advertised) ** RS485 can be the v3 2nd-UART; or to the 1st UART, but than v3 must be master and query every peer (including VemsTune, which must act as slave than !) * SPI is another option (SD-card with IO-extender) * in any case, the error-handling should be well established (no response for a certain time, what to do...), and mission-critical components should be "local" if possible |