For Arduino

Boards to control Bosch LSU 4.9 wideband sensors and compatible units from an Arduino.. The modules have their own microcontroller and talk to your Arduino board over the SPI bus, and the function libraries keep the Arduino code down to a few lines. The shield gives you direct access to the CJ125 chip. All of them come with working code examples.

Here are the add-ons that complete your setup and every module and shield we have made, current and discontinued. The comparison of current boards is on the Products page.

Add-ons

Extra boards for your Arduino setup: more modules at once, 3.3 V compatibility and data logging.

Image	Part	Utility	Compatible Arduinos	Compatible modules
	Hubs. SPI bus wiring hub for lambda modules.	Allows you to easily connect several lambda modules to a single arduino board.	UNO UNO WIFI MEGA Others	Lambda modules: 01M11V00. 01M21V00. 01M30V00.
	Voltage adapter for SPI bus, 3.3-5V.	It allows a 5 V slave to communicate on a 3.3 V SPI bus, accepting multiple slaves.	3.3V Arduino boards such as: NANO Others,	Lambda modules: 01M11V00. 01M21V00. 01M30V00.
	Datalogger Shield with MicroSD card and RTC. Controlduino 91S00V00.	It allows data to be saved in CSV format, and has connectors to facilitate the connection of lambda modules and I2C displays.	UNO UNO WIFI MEGA Others	Lambda modules: 01M11V00. 01M21V00. 01M30V00.

All modules and shields

Every board we have made, current and discontinued. Open any model for downloads and support.

Image	Part	Measure	APP	library	Type	Buetooth	Status	Lambda IC	Lambda Probe	Enhanced Power Supply	Voltage[V]
	01D21V00	%O2, Lambda, AFR. Wideband.+ RPM + EGT	iOS, macOS and Android See details →	Lambda_d.h	Plug-and-play module with its own microcontroller — works with or without an Arduino	BLE 5.1	Available	STMicroelectronics IC - L9780	Bosch LSU4.9 and others.	yes	10.8 to 16.5
	01M11V00	%O2, Lambda, AFR. Wideband.	No	Lambda.h	Module with its own microcontroller	No	Available	STMicroelectronics IC - L9780	Bosch LSU4.9 and others.	yes	10.8 to 16.5
	01S00V00	%O2, Lambda, AFR. Wideband.	No	No	Shield	No	Available	Bosch IC – CJ125	Bosch LSU4.9	No	10.8 to 16.5
	01S01V00 Replaced by Pro Lambda 01D21V00 →	%O2, Lambda, AFR. Wideband.	Android: Legacy app — live readings only	No	Shield	BLE 4.0	Last units	Bosch IC – CJ125	Bosch LSU4.9	yes	10.8 to 16.5
	01M21V00 Replaced by Pro Lambda 01D21V00 →	%O2, Lambda, AFR. Wideband. + rpm	No	Lambda_rpm.h	Module with its own microcontroller. Stackable with 02S00V00	No	Last units	STMicroelectronics IC - L9780	Bosch LSU4.9 and others.	yes	10.8 to 16.5
	01M30V00 Replaced by 2 x Pro Lambda 01D21V00 →	2x(%O2, Lambda, AFR. Wideband.) + rpm	No	LambdaX2_rpm.h	Module with its own microcontroller.	No	Last units	STMicroelectronics IC - L9780	2 x Bosch LSU4.9 and others.	yes	10.8 to 16.5
	02S00V00	Temperatures, Pressures, Analogue inputs, Inductive sensor.	No	No	Stackable shield. 01M21V00 stacks on top of this board.	BLE 4.0	Discontinued			yes	10.8 to 16.5

In summary: all modules and shields for Arduino.

Lambda Pro Module (D) Device

• Plug and play: connect the sensor and power cables and it starts working.
• No Arduino needed to operate. Its own microcontroller also drives an LCD display and Bluetooth.
• An evolution of the modules: connected to an Arduino it does everything a module does (it has its own Arduino library).
• Configurable from the Android, iOS and macOS app: lambda probe settings, RPM settings, which values appear on the LCD, and analogue output configuration.
• The app also provides: live readings (Android, iOS and macOS), data logging to .CSV at up to 100 samples per second (iOS and macOS only), and charting (iOS and macOS only).
• Advanced apps, under continuous development.
• Models:
  1. 01D11V00
     • Measures O₂, Lambda, AFR, RPM and EGT
     • Plug and play: connect the cables, power it up, and it works
     • Display connector
     • Integrated Bluetooth 5.1

Lambda (M) Modules for Arduino.

• Compatible with the Bosch LSU 4.9 wideband lambda probe
• Arduino function libraries included, making it easy to program and integrate into your projects
• Its own microcontroller performs all calculations and control; data is sent to the Arduino over an SPI bus, so the Arduino uses almost no resources
• Connects to the Arduino with just 6 wires, gathered into a single 2×3 connector
• Uses very few of the Arduino’s resources, thanks to its internal microcontroller handling the control and calculations
• Models:
  1. 01M11V00 — measures O₂, Lambda and AFR
  2. 01M21V00 — measures O₂, Lambda, AFR and RPM
  3. 01M30V00 — two lambda probes: 2× O₂, 2× Lambda, 2× AFR, RPM and two analogue inputs
  4. 01D11V00 — works like the rest of the models, and additionally offers its plug and play features, with no Arduino required
     • Measures O₂, Lambda, AFR, RPM and EGT (up to 1000 °C). Integrated Bluetooth. Works with or without Arduino. Configurable from a smartphone app.
     • Android app: live readings and device configuration (evolving in future versions)
     • iOS and macOS app: live readings, device configuration, data logging with .CSV export, and charting

Lambda (S) Shield for Arduino.

• Lambda probe interface based on the Bosch CJ125 IC
• Compatible with the Bosch LSU 4.9 wideband lambda probe
• The Arduino controls everything, which uses up a large share of its resources
• Stacks onto the Arduino and uses many of its pins
• Not well suited to integration into more complex projects
• Models:
  1. 01S00V00
  2. 01S01V00 — as above, but with integrated Bluetooth (including a small viewer app that refreshes three times per second) and an improved Arduino power supply.