Profiles#

Keeps a poultry brooder at 32 C by switching a heat lamp on below 31.5 C and off above 32.5 C, and alerts when the chicks are more than 4 C from target. Samples every two minutes on a healthy battery and eases off as it drains.

• Reads temperature in celsius, and publishes on poultry/brooder/temperature.
• Holds 32 by switching the output on below 31.5 and off above 32.5, and alerts outside 28 to 36.
• Samples every 2 min, every 10 min below 50 % charge, and every 30 min below 20 %.
• Draws Brooder temperature as a thermometer in celsius with a safe band of 28 to 36; Heat lamp as a switch in state.

Watches a river gauge and warns when the level rises more than 0.3 m in one sample, the signature of a flash flood. Samples every minute, since a flood gives little warning.

• Reads water level in meter, and publishes on water/river/level.
• Warns when the reading rises by more than 0.3 in one sample.
• Samples every 1 min, every 5 min below 50 % charge, and every 15 min below 20 %.
• Draws River level as a wave in meter with a safe band of 0.2 to 2.5; Rainfall as a bar in millimeter with a safe band of 0 to 25.

Reports the relative humidity in a grain store without driving anything, drawn as a droplet with a safe band up to 65 %, above which stored cereal takes on the moisture that mold grows in. Samples every 10 minutes, since a store changes slowly.

• Reads relative humidity in percent, and publishes on storage/grain/humidity.
• Reports readings and drives nothing.
• Samples every 10 min, every 1 hour below 50 % charge, and every 2 hours below 20 %.
• Draws Store humidity as a droplet in percent with a safe band of 30 to 65; Store temperature as a thermometer in celsius with a safe band of 5 to 30.

Opens an irrigation valve when soil moisture falls below 30 % and closes it again above 40 %, and alerts when the soil dries below 10 % or is waterlogged above 60 %. Samples slowly, since soil changes over hours and the battery has to last.

• Reads soil moisture in percent, and publishes on farm/irrigation/soil-moisture.
• Holds 35 by switching the output on below 30 and off above 40, and alerts outside 10 to 60.
• Samples every 5 min, every 30 min below 50 % charge, and every 1 hour below 20 %.
• Draws Soil moisture as a droplet in percent with a safe band of 10 to 60; Drip valve as a valve in state.

Watches the pressure in a water main and warns when it falls by more than 0.5 bar between samples, the signature of a burst or a valve left open downstream. Samples every 30 s, since a burst empties a tank in minutes.

• Reads pressure in bar, and publishes on water/main/pressure.
• Warns when the reading falls by more than 0.5 in one sample.
• Samples every 30 s, every 2 min below 40 % charge, and every 10 min below 15 %.
• Draws Main pressure as a dial in bar with a safe band of 2 to 6.

Waters a raised bed through a solenoid valve, opening it when the volumetric water content falls below 25 % and closing it above 35 %, and alerts when the bed is drier than 15 % or wetter than 45 %. The dashboard draws the bed as a droplet and the valve as a valve, with French and Swahili labels.

• Reads soil moisture in percent, and publishes on garden/bed/moisture.
• Holds 30 by switching the output on below 25 and off above 35, and alerts outside 15 to 45.
• Samples every 5 min, every 30 min below 50 % charge, and every 1 hour below 20 %.
• Draws Soil moisture as a droplet in percent with a safe band of 25 to 45; Bed valve as a valve in state.

Holds a vaccine fridge at 5 C by switching its cooler, and raises an alert the moment the temperature leaves the 2 to 8 C safe range. Keeps sampling often as the battery drains, since an unnoticed excursion costs more than a flat battery.

• Reads temperature in celsius, and publishes on cold-chain/fridge/temperature.
• Holds 5 by switching the output on above 5.5 and off below 4.5, and alerts outside 2 to 8.
• Samples every 1 min, every 5 min below 50 % charge, and every 15 min below 20 %.
• Draws Fridge temperature as a thermometer in celsius with a safe band of 2 to 8; Cooler as a switch in state; Compressor duty as a bar in percent with a safe band of 0 to 60, a node stat.

Reports a well's water level and warns once the level is on course to reach the dry mark within six more samples, so a pump is stopped before it runs dry.

• Reads water level in meter, and publishes on water/well/level.
• Watches a falling level and warns once it is on course to reach 0.5 within 6 more samples.
• Samples every 10 min, every 30 min below 50 % charge, and every 1 hour below 20 %.
• Draws Well level as a bar in meter with a safe band of 1 to 6; Battery as a battery in volt with a safe band of 3.5 to 4.3, a node stat.