Messages Display
This page is directly accessed from the Main page and indirectly from three other pages.
It has navigation touch buttons for the Main and Temperature pages.
These message are updated as received. The display time tag is stored with the message in the SD chip. Each message is also stored in EEPROM just before power down, or manually as a by-product of some action buttons. These are read out in setup() and put into the message memory for the initial page display.
The messages are as follows:
’t’ is from the “Dial Clock”. The value is not related to the Teensy RTC. Both have high-accuracy crystals. It is transmitted every minute.
’s’ is from a sensor box situated outside, part of the “Weather Logger”. Temperature and Humidity are from a BME680. Solar current is from the array which charges the sensor box. An accurate reading when the battery is charged needs an external battery capable of adsorbing the full output of the array, which can be up to 200 MA. The last is the internal 4-cell NiMh battery which powers the box at night. It is transmitted every 72 seconds.
‘r’ is also from the sensor box. The first is pressure needing either a 29 or a 30 in front. The second is the output voltage of the array. If less than 7, the internal battery is charging, else it is the external battery being charged. The third is the accumulated milliamp-hours today, the last is yesterday’s MAH. It is transmitted every 72 seconds.
’n’ is from the “Gas Sensor”. The letter denotes the color or off of its alarm LED. The last two are the hot and cold gas quality readings. Lower is worst. It is transmitted every 150 seconds.
‘z’ is also from the Gas Sensor. The first is temperature, the second is a photocell value. High is brighter. It is transmitted every 150 seconds.
‘u’ is from the “Garage Fan Control”. The first value is the temperature. The second indicates whether the main for is up or down. The third indicates whether the temperature is above or below the value from a potentiometer which enables the fan to run. The last indicates whether the fan is running. This message is sent only if the temperature changes more than degrees or if any of the discrete change.
‘x’ is from the “antique” NIXIE clock device. It has six fields giving the position of its controls, whether the NIXIEs are lit or not, their displayed values and a measure of the ambient illumination.