M5STACK ESP32 CORE2 IoT Development Kit User Manual
- June 5, 2024
- M5STACK
Table of Contents
M5STACK ESP32 CORE2 IoT Development Kit User Manual
1. OUTLINE
M5Stick CORE2 is ESP32 board which based on ESP32-D0WDQ6-V3 chip, contained 2-inch TFT screen. The board is made of PC+ABC.
1.1 Hardware Composition
The hardware of CORE2: ESP32-D0WDQ6-V3 chip, TFT screen, Green LED, Button,
GROVE interface, Type.C-to-USB interface, Power Management chip and battery.
ESP32-D0WDQ6-V3 The ESP32 is a dual-core system with two Harvard Architecture
Tense LX6 CPUs. All embedded memory, external memory and peripherals are
located on the data bus and/or the instruction bus of these CPUs. With some
minor exceptions (see below), the address mapping of two CPUs is symmetric,
meaning that they use the same addresses to access the same memory. Multiple
peripherals in the system can access embeddedmemory via DMA.
TFT Screen is a 2-inch color screen driven ILI9342C with a resolution of 320 x
240.
Operating voltage range is 2.6~3.3V, working temperature range is -25~55°C.
Power Management chip is X-Powers’s AXP192. The operating voltage range is
2.9V~6.3V and the charging current is 1.4A.
CORE2 equips ESP32 with everything needed for programming, everything needed
for operation and development
2.PIN DESCRIPTION
2.1. USB INTERFACE
M5CAMREA Configuration Type-C type USB interface, support USB2.0 standard communication protocol.
2.2. GROVE INTERFACE
4p disposed pitch of 2.0mm M5CAMREA GROVE interfaces, internal wiring and GND, 5V, GPIO32, GPIO33 connected.
3.FUNCTIONAL DESCRIPTION
This chapter describes the ESP32-D0WDQ6-V3 various modules and functions.
3.1. CPU AND MEMORY
Xtensa® single-/dual-core32-bitLX6microprocessor(s), upto600MIPS (200MIPSforESP32-S0WD/ESP32-U4WDH, 400 MIPS for ESP32-D2WD):
- 448 KB ROM
- 520 KB SRAM
- 16 KB SRAM in RTC
- QSPI supports multiple flash/SRAM chips
3.2. STORAGE DESCRIPTION
3.2.1.External Flash and SRAM
ESP32 support multiple external QSPI flash and static random access memory (SRAM), having a hardware-based AES encryption to protect the user programs and data.
- ESP32 access external QSPI Flash and SRAM by caching. Up to 16 MB external Flash code space is mapped into the CPU, supports 8-bit, 16-bit and 32-bit access, and can execute code.
- Up to 8 MB external Flash and SRAM mapped to the CPU data space, support for 8-bit, 16-bit and 32-bit access. Flash supports only read operations, SRAM supports read and write operations.
3.3. CRYSTAL
External 2 MHz~60 MHz crystal oscillator (40 MHz only for Wi-Fi/BT functionality)
3.4. RTC MANAGEMENT AND LOW POWER CONSUMPTION
ESP32 uses advanced power management techniques may be switched between different power saving modes. (See Table 5).
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Power saving mode
– Active Mode: RF chip is operating. Chip may receive and transmit a sounding signal.
– Modem-sleep mode: CPU can run, the clock may be configured. Wi-Fi / Bluetooth baseband and RF
– Light-sleep mode: CPU suspended. RTC and memory and peripherals ULP coprocessor operation. Any wake-up event (MAC, host, RTC timer or external interrupt) will wake up the chip. – Deep-sleep mode: only the RTC memory and peripherals in a working state. WiFi and Bluetooth connectivity data stored in the RTC. ULP coprocessor can work. – Hibernation Mode: 8 MHz oscillator and a built-in coprocessor ULP are disabled. RTC memory to restore the power supply is cut off. Only one RTC clock timer located on the slow clock and some RTC GPIO at work. RTC RTC clock or timer can wake up from the GPIO Hibernation mode. -
Deep-sleep mode
– related sleep mode: power save mode switching between Active, Modem-sleep, Light-sleep mode. CPU, Wi-Fi, Bluetooth, and radio preset time interval to be awakened, to ensure connection Wi-Fi / Bluetooth.
– Ultra Low-power sensor monitoring methods: the main system is Deep-sleep mode, ULP coprocessor is periodically opened or closed to measure sensor data. The sensor measures data, ULP coprocessor decide whether to wake up the main system.
4.ELECTRICAL CHARACTERISTICS
4.1. LIMIT PARAMETERS
1. VIO to the power supply pad, Refer ESP32 Technical Specification Appendix IO_MUX, as SD_CLK of Power supply for VDD_SDIO.
Press and hold the side power button for two seconds to start the device. Press and hold for more than 6 seconds to turn off the device. Switch to the photo mode through the Home screen, and the avatar that can be obtained through the camera is displayed on the tft screen. The USB cable must be connected when working, and the lithium battery is used for short-term storage to prevent power failure.
FCC Statement: Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference
that may cause undesired operation.
FCC Radiation Exposure Statement: This equipment complies with FCC radiation
exposure limits set forth for an uncontrolled environment .This equipment
should be installed and operated with minimum distance 20cm between the
radiator& your body.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
–Reorient or relocate the receiving antenna.
–Increase the separation between the equipment and receiver.
–Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
–Consult the dealer or an experienced radio/TV technician for help.
UI Flow Quick Start
This tutorial applies to M5Core2
Burning tool
Please click the button below to download the corresponding M5Burner firmware burning tool according to your operating system. Unzip and open the application.
Firmware burning
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Double-click to open the Burner burning tool, select the corresponding device type in the left menu, select the firmware version you need, and click the download button to download.
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Then connect the M5 device to the computer through the Type-C cable, select the corresponding COM port, the baud rate can use the default configuration in M5Burner, in addition, you can also fill in the WIFI that the device will be connected to during the firmware burning stage information. After configuration, click “Burn” to start burning.
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When the burning log prompts Burn Successfully , it means that the firmware has been burned.
When first burning or the firmware program runs abnormally, you can click “Erase” to erase the flash memory. In the subsequent firmware update, there is no need to erase again, otherwise the saved Wi-Fi information will be deleted and the API Key will be refreshed.
Configure WIFI
UIFlow provides both offline and web version of the programmer. When using the
web version, we need to configure a WiFi connection for the device. The
following describes two ways to configure WiFi connection for the device (Burn
configuration and AP hotspot configuration).
Burn configuration WiFi(recommend)
UIFlow-1.5.4 and versions above can write WiFi information directly through
M5Burner.
AP hotspot configuration WiFi
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Press and hold the power button on the left to turn on the machine. If WiFi is not configured, the system will automatically enter the network configuration mode when it is turned on for the first time. Suppose you want to re-enter the network configuration mode after running other programs, you can refer to the operation below. After the UIFlow Logo appears at start-up, quickly click the Home button (center M5 button) to enter the configuration page. Press the button on the right side of the fuselage to switch the option to Setting, and press the Home button to confirm. Press the right button to switch the option to WiFi Setting, press the Home button to confirm, and start the configuration.
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After successfully connecting to the hotspot with your mobile phone, open the mobile phone browser to scan the QR code on the screen or directly access 192.168.4.1, enter the page to fill in your personal WIFI information, and click Configure to record your WiFi information. The device will restart automatically after successfully configuring and enter programming mode. Note: Special characters such as “space” are not allowed in the configured WiFi information.
Network Programming Mode and API KEY
Enter network programming mode Network programming mode is a docking mode
between M5 device and UIFlow web programming platform. The screen will show
the current network connection status of the device. When the indicator is
green, it means that you can receive program push at any time. Under default
situation, after the first successful WiFi network configuration, the device
will automatically restart and enter the network programming mode. If you do
not know how to re-enter the programming mode after running other
applications, you can refer to the following operations.
restarting, press button A in the main menu interface to select the
programming mode and wait till the right indicator of the network indicator to
turn green in the programming mode page. Access UIFlow programming page by
visiting flow.m5stack.com on a computer browser.
API KEY Pairing
API KEY is the communication credential for M5 devices when using UIFlow web programming. By configuring the corresponding API KEY on the UIFlow side, the program can be pushed for the specific device. The user needs to visit flow.m5stack.com in the computer web browser to enter the UIFlow programming page. Click the setting button in the menu bar at the upper right corner of the page, enter the API Key on the corresponding device, select the hardware used, click OK to save and wait till it prompts successfully connecting.
HTTP
Complete the above steps, then you can start programming with UIFlow. For example: Access Baidu via HTTP
BLE UART
Function Description Establish Bluetooth connection and enable Bluetooth
passthrough service.
- Init ble uart name Initialize settings, configure Bluetooth device name.
- BLE UART Writer Send data using BLE UART.
- BLE UART remain cache Check the number of bytes of BLE UART data.
- BLE UART read all Read all data in BLE UART cache.
- BLE UART read characters Read n data in BLE UART cache.
Instructions
Establish Bluetooth passthrough connection and send on / off control LED.
UIFlow Desktop IDE
UIFlow Desktop IDE is an offline version of UIFlow programmer which does not require network connection, and can provide you with responsive program push experience. Please click the corresponding version of UIFlow-Desktop-IDE to download according to your operating system .
USB programming mode
Unzip the downloaded UIFlow Desktop IDE archive and double-click to run the
application.
After the app starts, it will automatically detect whether your computer has a USB driver (CP210X), click Install, and follow the prompts to finish installation.
After the driver installation is complete, it will automatically enter the UIFlow Desktop IDE and automatically pop up the configuration box. At this time, connect the M5 device to the computer through the Tpye-C data cable.
Using UIFlow Desktop IDE requires M5 device with UIFlow firmware and enter USB programming mode . Click the power button on the left side of the device to restart, after entering the menu, quickly click the right button to select USB mode.
Select the corresponding port, and the programming device, click OK to connect.
Related Links
UIFlow Block introduction
References
- Document
- M5Stack is the innovator of modular IoT development platform.
- M5Stack · GitHub
- M5Stack is the innovator of modular IoT development platform.