Technical specifications, LED status codes, and command reference for the ESCTL Temperature Monitor (Ethertemp) hardware.
Specifications
- Sensor Type: Digital 1-Wire (DS18B20 compatible).
- Range: -55°C to +125°C (-67°F to +257°F).
- Accuracy: ±0.5°C from -10°C to +85°C.
- Resolution: 9 to 12 bits (user-selectable).
- Sampling Rate: Configurable from 1 second to 60 minutes.
LED Status States
| LED |
Color |
State |
Meaning |
| Power |
Blue |
Solid |
Power is applied. |
| Data |
Yellow |
Flashing |
Sensor communication or data transmission in progress. |
| Alarm |
Red |
Solid |
Temperature exceeds pre-set thresholds. |
Pinouts
| Pin |
Label |
Description |
| 1 |
VCC |
3.3V - 5V Power |
| 2 |
DQ |
1-Wire Data Line |
| 3 |
GND |
Ground |
| 4 |
ALM |
Alarm Output (Open Collector) |
Software Commands
| Command |
Description |
READ |
Returns the current temperature reading. |
SET_THRESH [H] [L] |
Configures the high and low alarm temperature boundaries. |
LOG_DUMP |
Downloads the stored temperature history from local memory. |
CALIBRATE [offset] |
Applies a software offset to the readings to compensate for sensor variance. |
Physical Construction
- Probe: Stainless steel (304 grade), waterproof.
- Cable Length: 3 meters (standard), extendable up to 50 meters.
- Controller Board: Compact PCB designed for integration into server racks or environmental chambers.