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Posted on by Jean-Luc Aufranc (CNXSoft) - 6 Comments on An ESP32-based BBC Micro:bit clone – Meet Mbits

An ESP32-based BBC Micro:bit clone – Meet Mbits

BBC Micro:bit clone ESP32 Mbits

A few years ago, we noted a BBC Micro:bit clone based on ESP32 WiSoC with Banana Pi ‘s BPI:bit board with an array of 25 RGB LEDs and WiFi & Bluetooth LE connectivity. There’s now another such clone with Elecrow Mbits designed in a way that resembles the BBC Micro:bit v2 board, but replacing the Nordic Semi nRF52833 2.4GHz/BLE SoC with the ESP32 dual-core wireless chip with support for both WiFi and BLE. The specifications between Elecrow Mbits and BBC Micro:bit v2 are close enough, although ESP32 is a more powerful processor, and the MBits board comes with more memory and storage. Power consumption of the BBC Micro:bit v2 should be much better, so if anything needs to run on battery for an extended period of time, it may be a better choice, or you’re gonna need a bigger battery.  The GPIO pinout looks different too, so not all Micro:bit […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 9 Comments on ZiGate-Ethernet – An ESP32 Ethernet, WiFi, and BLE Gateway with optional Zigbee connectivity

ZiGate-Ethernet – An ESP32 Ethernet, WiFi, and BLE Gateway with optional Zigbee connectivity

ZiGate Ethernet Raspberry Pi 4 enclosure

Frédéric Dubois, aka fairecasoimeme, has recently released ZiGate-Ethernet, an home automation gateway based on Espressif Systems ESP32 wireless SoC with Ethernet, WiFi, and Bluetooth LE connectivity. The gateway can also take an optional PiZiGate+ Zigbee module for support for a wider range of home automation gizmos, and everything is designed to fit in the official Raspberry Pi 4 enclosure. ZiGate-Ethernet specifications: Wireless module – ESP32-WROOM-32E with ESP32 dual-core processor, 16MB flash, PCB antenna Connectivity 10/100M Ethernet RJ45 port implemented through LAN8720 as on several other ESP32 Ethernet boards 2.4GHz WiFI 4 Bluetooth LE 4.2/5.x Zigbee through PiZiGate+ module with PCB antenna or optional external antenna USB – Micro USB port for power and programming Expansion – 16-pin GPIO header with up to 10x GPIO, 7x ADC, UART, 5V, 3.3V, and GND Misc- Reset and Flash button, ESP32/FTDI UART selection switch, Power Supply – 5V/500mA via micro USB  port Dimensions – […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 3 Comments on Bluetooth 5.3 new features lower latency, interference, improve battery life, security

Bluetooth 5.3 new features lower latency, interference, improve battery life, security

Bluetooth 5.3 Channel Classification Enhancement

Bluetooth 5.3 Core Specification was adopted on July 13, 2021, without fanfare, and the only related announcement that I could find is CEVA RivieraWaves Bluetooth IP getting support for Bluetooth 5.3. Bluetooth 5.3 brings four new features or enhancements and removes one extension from the core specification: Periodic Advertising Enhancement – The AdvDataInfo (ADI) field of the common extended advertising payload format may now be included in AUX_SYNC_IND protocol data units (PDUs) which are broadcast when a device is performing periodic advertising. The Bluetooth Low Energy (LE) controllers may now use the information in the ADI field to recognize packets that contain retransmitted copies of identical or semantically equivalent data, and discard those packets in order to prevent unnecessary processing on the nodes, and make sure the overall throughput is not affected due to retransmitted packets. Encryption Key Size Control Enhancement – In Bluetooth BR/EDR, encryption key sizes are negotiated […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 3 Comments on BL-63B – A smaller BL602 IoT module that sells for $1.5

BL-63B – A smaller BL602 IoT module that sells for $1.5

Bouffalo Labs BL602 is a low-cost, low-power RISC-V microcontroller that offers 2.4 GHz WiFi and Bluetooth 5.0 LE connectivity for IoT projects for about the price of ESP8266. We first discovered it last year, together with a development board. Pine64 created its own PineCone board fitted with the $2 PineNut module, and some reverse-engineering work has started on BL602 SDK. But there’s now another smaller BL602 module with “Machine Intelligence” (that’s the company name) BL-63B that sells for $1.5 on Taobao in China, as well as on LCSC Electronics albeit you’d need to purchase 1000 pieces to get that price, and single-unit pricing is currently $2.5. BL-63B WiFI & BLE module specifications: SoC – Bouffalo Labs BL602 32-bit RISC-V processor @ up to 192 Mhz with 276KB RAM, 128KB ROM, 1Kbit eFuse, WiFi and BLE Storage – 2MB flash Wireless 2.4GHz 802.11b/g/n WiFI 4 1×1 SISO up to 65 Mbps […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 17 Comments on ESP32-H2 RISC-V WiSoC announced with Zigbee 3, Thread, and Bluetooth LE 5.2

ESP32-H2 RISC-V WiSoC announced with Zigbee 3, Thread, and Bluetooth LE 5.2

ESP32-H2 with Thread, Zigbee 3, BLE 5.2

Just a few days ago, we noted ESP32-H2 802.15.4 & BLE RISC-V SoC had shown up in the source code, and tried to derive specs and a block diagram from the info seeing it was similar to ESP32-C3, but swapping the WiFi radio for an 802.15.4 radio. We don’t need to guess anymore, as Espressif Systems has just announced ESP32-H2 RISC-V WiSoC with support for Zigbee 3.x, Thread 1.x through the 802.15.4 radio, as well as Bluetooth LE 5.2. So overall it’s very close to what we discussed from the information in the source code with ESP32-H2 highlights including: CPU – 32-bit RISC-V core (at up to 96 MHz) RAM – 256 KB SRAM Storage – External flash support Wireless connectivity IEEE 802.15.4 radio with Zigbee 3.x and Thread 1.x support, Matter protocol Bluetooth 5.2 (LE) radio designed in-house, with support for direct connection, Bluetooth Mesh, Bluetooth LE Audio Future […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 10 Comments on $2 MXCHIP EMC3080 WiFi and Bluetooth LE IoT module integrates Cortex-M33 MCU

$2 MXCHIP EMC3080 WiFi and Bluetooth LE IoT module integrates Cortex-M33 MCU

MXCHIP EMC3080 Cortex-M33 WiFi & Bluetooth-IoT module

While nowadays most people from the maker community are working with ESP8266 or ESP32 modules or boards for IoT projects requiring Bluetooth LE and/or WiFi connectivity, we’ve also covered some low-cost alternatives such as Bouffalo Labs BL602 or Realtek RTL8710. MXCHIP EMC3080 module offers yet an alternative with 2.4 GHz 802.11 b/g/n WiFi and Bluetooth LE 4.2/5.0. Where it differentiates against other solutions is that it features a more secure Cortex-M33 core clocked at 100 MHz, as found in UNISOC V5663 and Ameba RTL8722DM wireless SoCs, but still getting a fairly low price tag of $2.35 on Seeed Studio, which drops to $2.10 per pieces for orders of 10 or more units. MXCHIP EMC3080 module specifications: MCU – MX1300CF Cortex-M33 processor at up to 100 MHz with 256KB SRAM, 2MB XIP flash, 384 or 512 bytes OTP memory Connectivity WiFi 802.11 b/g/n 1T1R WiFi @ 2.4GHz Single Frequency HT20 support […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 7 Comments on ThingPulse ESPGateway features not one, but two ESP32 wireless modules

ThingPulse ESPGateway features not one, but two ESP32 wireless modules

ESPGateway

ThingPulse ESPGateway is a WiFi and Bluetooth gateway equipped with two ESP32 modules, two external antennas, and a footprint for an RN2483 LoRaWAN chip. The two ESP32-WROVER modules communicate over UART, and this design allows one ESP32 to transmit data over WiFi or Bluetooth, while the other remains in promiscuous mode, or transmits data using ESPNow low-power proprietary protocol for applications we’ll discuss below. ESPGateway hardware specifications: Wireless connectivity 2x ESP32-WROVER-IB modules with dual-core ESP32 processor, 4MB flash, and 8MB PSRAM Footprint for RN2483 LoRaWAN module connected to one of the ESP32 module 2x external antennas for longer range Expansion – Unpopulated headers to access to 18 GPIO pins, 3.3V, and GND to add sensors, displays, actuators… Debugging – USB-C port for serial console connected to one CP2104 USB to TTL chip plus switch to select ESP1/ESP2 module Misc – 4x WS2812B programmable LEDs, Reset button ThingPulse explains in more […]

Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on M5Stack Atom DTU LoRaWAN Kit also supports WiFi, RS485, Modbus communication

M5Stack Atom DTU LoRaWAN Kit also supports WiFi, RS485, Modbus communication

ESP32 WiFI, Bluetooth, LoRaWAN, and RS485 kit

M5Stack is known for its ESP32 based building blocks for the IoT with WiFi & Bluetooth wireless connectivity, I/O headers, and block-specific features like a tiny color display, a speaker, a touchscreen display, a camera, and more. The company’s latest product is the M5Stack Atom DTU LoRaWAN Kit based on ESP32 ATOM Lite, as well as ASR Micro ASR6501 LoRa module (SX1302 based) and one RS485 header that allows for industrial communication notably with the Modbus protocol. M5Stack Atom DTU LoRaWAN Kit specifications: Wireless connectivity  M5Stack ATOM Lite with ESP32 WiFi 4 and Bluetooth 4.2/5.x dual-core SoC ASR ASR6501 LoRa chip Operating frequency – 868MHz or 915 MHz Transmit power – Up to +21dBm RX sensitivity – Up to -137dBm (SF=12/BW=125KHz) Serial communication – UART 115200bps (AT command) via ESP32 Antenna – SMA antenna connector Power consumption @ 3.3V (from ASR6501 datasheet) Tx @ +21dBm – 106 mA Rx – […]

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