Advanced sensor technology

The extended sensor range includes sensors that are not connected to the NMEA0183 or NMEA2000 buses. Additionally, inexpensive sensors can be connected to the I2C and 1-Wire buses. The OBP40 and OBP60 differ in terms of the voltage ranges for the I2C bus and the isolation of the bus system.

Type	Bus	Tension	Isolation
OBP40	I2C	3.3V TTL	No
OBP40	1W	3.3V TTL	No

Type	Bus	Tension	Isolation
OBP60	I2C	5.0V TTL	And
OBP60	1W	3.3V TTL	No

The table below lists some sensors that can be used with the OBP40 and the OBP60.

Warning

The sensor modules are designed for specific voltage ranges. Ensure you use the correct sensors. Using 3.3V modules in 5V systems can damage them. In this case, level converters are necessary. Most 5V modules can also be used in 3.3V systems if operated at 3.3V.

Note

When purchasing BMP280 and BME280 modules, please note that there are different types that look similar but behave differently. You can identify the types by the package size and the shape of the chip.

Fig.: Versions BMP280/BME280 for 3.3V and 5V

Type	Bus	Sensor	3.3V	5V	Used pins
BMP085	I2C	T, P	X		Vin, SCL, SDA, GND
BMP180	I2C	T, P	X		Vin, SCL, SDA, GND
BMP280	I2C	T, P	X	X	Vin, SCL, SDA, GND
BME280	I2C	T, P, H	X	X	Vin, SCL, SDA, GND
SHT21	I2C	T, H	X	X	Lead SCL, SDA, GND
SHT31	I2C	T, H	X		Vin, SCL, SDA, GND
HTU21	I2C	T, H	X	X	Vin, SCL, SDA, GND
BMP280	I2C	T, P	X		Vin, SCL, SDA, GND
BME280	I2C	T, P, H	X		Vin, SCL, SDA, GND
AS5600	I2C	R	X	X	VCC, SCL, SDA, GND
INA219	I2C	In, I	X	X	VCC, SCL, SDA, GND
INA226	I2C	U, I, W	X	X	VCC, SCL, SDA, GND
INA226	I2C	U, I, W	X	X	VCC, SCL, SDA, GND
SN65H230	TTL	CAN	X		3.3, CRX, CTX, GND
DS18B20	1W	T	X		Wine, Data, GND

T - Air temperature
P - Air pressure
H - Relative humidity
R - Rotation 0…360°
U-voltage
I - Strom
W - Power