M5 Stack COMMU Module Extend RS485/TTL CAN/I2C Port COMMU is a Muti-Communication-Interface-Converter. Integrated with 2 I2C, 1 TTL, 1 CAN, 1 RS485. Apparently, COMMU has packed with most of the series communications. Default connection: TTL - UART0, RS485 - UART2. Since the ESP32 pin map is allowed for re-assign, you can re-assign or re-mapping the TTL or RS485 interface to other pins. Be careful about TTL Interface. It is a UART Interface actually by default. But you can switch it to connect with UART2 after changing those jumpers(J6, J7, J9, J10).

M5 Stack Earth Moisture Unit EARTH unit is a Soil Moisture Sensor for measuring the moisture in the soil and similar materials. The soil moisture sensor usage is pretty straight forward, the two large exposed pads function as probes for the sensor, together acting as a variable resistor. The higher moisture that is in the soil means the better the conductivity between the two so that the sensor will result in lower resistance, and a higher SIG out. You can read the moisture in the soil by using the ADC. Inside this Unit, we've added extra potentiometers to change the measurement range. Note: Electrode of the unit is not anti-corrosive, or waterproof, for POC purposes only. Please, do NOT put it in a humid environment for a long while.

M5 Stack Esp32 downloader kit ESP32 Downloader Kit is a USB-TTL adapter board for ESP32 /ESP8266, This item contains a CP2104/CH9102 chip. It supports one-touch download without chip and pin-down resetting manual. Plug-in board and a row of pins parts from the set can be so convenient for ESP32/ESP8266 series development board or M5Stack series products for program burning or serial debugging. Also check M5Stack ESP32 PSRAM Timer Camera X (OV3660) . The M5Stack ESP32 PSRAM Timer Camera X (OV3660) is a camera module that can take timed photos, has low power consumption, and can transmit images over Wi-Fi.

M5 Stack Grove-T Connector (5pcs) CONNEXT-T is a T-shaped hub. Is this remind you of the HUB unit? They are basically the same thing, just in different shapes. This is also used for CONNEXT port expansion. Note: CONNEXT-T is just a hardware expander, if you are looking for a hardware and software(standard protocol) expander like I2C, Single-bus, please check PaHUB or PbHUB. If you connected two I2C slave devices onto HUB that share the same address, you will have a problem getting I2C data from both. Also check the M5 Stack Mini 3A Relay Unit , It is described as an M5Unit implementing Relay functions, serving as an electrically operated switch. The Relay supports input voltage up to 30V DC and 220V AC. It has 3 pins named ON, OFF, and COM, allowing programming to connect COM to either ON or OFF using digital GPIO output. The applications include remote control of high-power appliances.

M5 Stack Mini 3A Relay Unit RELAY as it says is an M5Unit that implements Relay functions. Relay can be used as an electrically operated switch, uses an electromagnet to mechanically operate a switch, where it is necessary to control a large power load circuit by a separate low-power signal such as digital signal output from a microprocessor. The Relay support input voltage of up to 30V DC and 220V AC. There are 3 pins named: ON, OFF, COM. You can program to make COM connect to ON or OFF, just by high and low output of a digital GPIO. Applications: Remote control of high-power appliances, such as refrigerators, air conditioners, TVs, etc. Also check the M5 Stack Grove-T Connector , which comes in a package of 5 pieces. It is a T-shaped hub called CONNEXT-T, used for CONNEXT port expansion. Also check M5 Stack 1 to 3 HUB Unit . The HUB Unit is a device that allows you to connect more GROVE ports to your M5Stack device. This is useful if you want to use multiple sensors or other devices at the same time.

M5 Stack Mini Angle Unit with Potentiometer ANGLE is a rotary switch Unit that simply includes a 10K Ohm potentiometer inside. This unit can be used for Continuous signal rotatory control for applications such as volume, brightness, or motor speed. A potentiometer is a manually adjustable variable resistor with three terminals: Two terminals are connected to a resistive element, the third terminal is connected to an adjustable wiper. The position of the wiper determines the output voltage. The out voltage is captured and converted by AD on ESP32 on portB. In the M5 Stack product system, Normally the Grove color indicates the type of communications. Black: Single BUS (AD, DA, GPIO) Red: I2C Blue: Uart White: Others(depends)

M5 Stack PDM Microphone Unit (SPM1423) PDM mini Unit is a digital MEMS silicon-based microphone based on PDM (Pulse Density Modulation) signal. The microphone has a high signal-to-noise ratio, high sensitivity, low power consumption, anti-radio frequency interference, smooth frequency response, and other characteristics. It automatically switches the microphone state according to the clock frequency (power down/activate/sleep)and can be widely used for the audio data collection on wearable devices and smart digital devices. Applications: Spectrum Analyzer Recorder Noise meter

M5 Stack PIR Motion Unit (AS312) The M5 Stack PIR Motion Unit (AS312) is a human body infrared unit that detects the infrared radiation emitted and reflected by the human body or object. When infrared is detected, the output level is high and it takes a while. The unit has a 2-second delay time and communicates with the M5Core via the GROVE B. It has a sensing range of less than 100° and a quiescent current of less than 60uA. The unit supports UIFlow and Arduino and has two Lego installation holes. The M5 Stack PIR Motion Unit (AS312) can be used in various applications, such as an automatic system to perform the tasks of Safe Entry, a gate/door fingerprint security system with body temperature checks for the anti-COVID measure, and a simple watch device using UIFlow. The unit is reasonably priced and has received positive reviews for its quality and usefulness. The M5 Stack PIR Motion Unit (AS312) is available for purchase from various online stores. Features Detects infrared radiation emitted and reflected by human body or object Sensing range of less than 100° Delay time of 2 seconds Communicates with M5Core via GROVE B Two Lego installation holes Quiescent current of less than 60uA Small and lightweight, easy to integrate into various projects Applications: Security Product

M5 Stack PLC Proto Industrial Board Module M5 Stack PLC M12 is a Base specifically designed for industrial application. DC Power in 9-24V. Does this PLC remind you of the 'PLC' in industrial control short for 'Programmable Logic Controller'. This PLC base is not the typical 'PLC' used in the programmable controller, but its does able to implement the most common controller in the industrial field. Based on the current M5 development system, you can add as many Relays as you want, you can enable the TTL-RS485 communication, you can layout your customized circuit on the protoboard. you also can make it a LoRa node by stacking a LoRa module etc. This base gives you an unlimited number of combinations, it is powerful, flexible, and covered with an industrial-grade case. If you happen to work in an industrial field, We especially recommend this PLC base to you which will surely give you the best and the fastest way to resolve your requirement. Also check M5Stack ATOM Matrix . The board is small and has many built-in components, making it suitable for portable and miniature projects. It has an ESP32 chip with Wi-Fi and Bluetooth, an LED matrix, an inertial sensor, and a button. It can be programmed using Arduino or UIFlow. Also check M5StickC ESP32-PICO Mini IoT Development Kit . The M5StickC ESP32-PICO is a small, open-source development board that is good for prototyping IoT projects. It has a lot of features

M5 Stack PROTO Module with Extension & Bus Socket PROTO is a pure universal prototype perboard. You can have the total freedom to make your own project as you want it, with prototyping perboards that allow laying out the customized circuit to interact with the M5 core via M-BUS.