Gary Graham
TVWBB Fan
Great progress on HM in the past few years !
I am ready to build a HM v4.2 when it is released and plan to use the thermocouple for the fire and a thermistor for the pit, but would like to use a bunch more meat probes.
I built a 10 channel data logging controller called "MegaMometer" back in 2011, and am ready to upgrade to a HM with all the snazzy graphics and WiFi web server... but does the HM v4.2 board or the Pi have any unused IO pins so I could add more meat probes ?
If there are no extra pins, I am interested in your thoughts about "if or how" some kind of a meat probe multiplexer could work. Is it possible to add some Bluetooth gadget on a USB port on the Pi and have bunch of wireless thermistors that way ? Trying to keep the cost down because everything is 8x more expensive because of the number of probes, so I don't mind using wires if they are long enough.
Or read 8 analog inputs controlled by 3 IO pins like this http://playground.arduino.cc/Learning/4051
Or have up to 16 analog inputs using a ADS1158 over the I2C ?
I am ready to build a HM v4.2 when it is released and plan to use the thermocouple for the fire and a thermistor for the pit, but would like to use a bunch more meat probes.
I built a 10 channel data logging controller called "MegaMometer" back in 2011, and am ready to upgrade to a HM with all the snazzy graphics and WiFi web server... but does the HM v4.2 board or the Pi have any unused IO pins so I could add more meat probes ?
If there are no extra pins, I am interested in your thoughts about "if or how" some kind of a meat probe multiplexer could work. Is it possible to add some Bluetooth gadget on a USB port on the Pi and have bunch of wireless thermistors that way ? Trying to keep the cost down because everything is 8x more expensive because of the number of probes, so I don't mind using wires if they are long enough.
Or read 8 analog inputs controlled by 3 IO pins like this http://playground.arduino.cc/Learning/4051
Or have up to 16 analog inputs using a ADS1158 over the I2C ?
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