Sensor_Specs.md

Sensor Electrical Characteristics

NAME	Power Sup	Logic	Clock Speed	Extra Clock Stretch Limit	Pull ups on breakout board	Board
LCD20x4	5V	5V	100kHz	No		LCD display
LEVEL Shift	3.3 & 5V				5k	Level Shifter
SPS30	5V	3.3 & 5 V w pullup	100kHz	No	Inf (add 10k)	Senserion particle, not compatible with LCD driver
SCD30	3.3-5V	out: 2.4=h 0.4=l in: 1.75-3=h	50 [...100]kHz	150ms	Inf (add 10k)	Senserion CO2
SGP30	1.8-3.3V		400kHz	No	10k	Senserion VOC, eCO2
BME680	1.8-3.3V		400kHz	No	10k	Bosch Temp, Humidity, Pressure, VOC
CCS811	1.8-3.6V		400kHz	100ms	5k	Airquality eCO2 tVOC
MLX90614	3.3 or 5V	3.3V or 5V version	10-100kHz	No	Inf	Melex Temp Contactless
MAX30105	1.8, 3.3V		400kHz	No	5k	Maxim pulseox

Sensirion sensors without pullups (Inf) need an external 10k pullup on SDA and SCL All pullups will add in parallel and lower the total pullup resistor value, therfore requiring more current to operate the i2c bus.

Sensor characteristics cont.

Sensor	Measurement Interval	Power Consumption	Sleepmode/Idlemode	Data ready hardware	Cost
	min, max [default] [s]	[mW]	[mW]		$
LCD	0.3...
SCD30	2..1800 [4]	19	Reduce Interval	Yes	54
SPS30	1	60	0.36	No	45
SGP30	1...	48	NA	No	24
BME680	1,3,300	0.9	0.00015	No	10
CCS811	0.25,1,10,60	4	0.019	Yes	12
MLX90614	0.25/1				9
MAX30105	0.01...				12

Sensor characteristics cont.

Sensor	i2c Address
LCD	x27 generic, x20 Adafruit
SCD30	x61
SCD40	x62
SCD41	x62
SPS30	x69
SGP30	x58
BME680	x76/x77
BME688	x76/x77
BME280	x76/x77
CCS811	x5B (address pin on high) otherwise x5A)
MLX90614	x5A
MAX30105	x57