Is there a sketch for connecting more than one DS18B20 external temperature probe to the emonTH2 whilst retaining use of the onboard Si7021 temperature sensor?
I would like to connect up around 4 or 5 external probes in addition to the onboard sensor and have logging at least every 15 seconds. The reason, to monitor my combi boiler flow and return temperatures, cold water inlet temperature, hot water outlet temperature and outside air temp from the rear of the house, in addition to the kitchen temperature and humidity using the onboard sensor. Of course, powering the whole lot from a 5V DC supply rather than AA batteries.
I saw this: ARCHIVE: : emonTH Multiple DS18B20 Sensors
But I assume this applies to the older emonTH with the onboard DHT22 sensor so wouldn’t work with the later emonTH2?
The reason for wanting to check, is to ensure the combi return temperature is always kept below 54C so that it is condensing and running as efficiently as possible and to see how low I can go for a given outside temperature to improve efficency whilst maintaining a warm house!
I’m sure others would find it useful if monitoring a heat pump (flow, return, brine in/out, DHW, air) but without the extras of the emonTx or the heat pump board.