Espressif Systems has unveiled two new ESP32-S2 WiFi modules part of the new MINI series modules, namely ESP32-S2-MINI-1U with IPEX antenna, and ESP32-S2-MINI-1 with a PCB antenna. The press release also mentions upcoming ESP32-S3 and ESP32-C3 processors with few details. Let’s have a look. ESP32-S2-MINI modules Preliminary specifications: SoC – Espressif ESP32-S2FH4 single-core 32-bit LX7 microcontroller @ up to 240 MHz, RISC-V ultra-low-power co-processor, 320 kB SRAM, 128kB ROM, 2.4 GHz WiFi 4 connectivity, 4MB flash Antenna ESP32-S2-MINI-1 – PCB antenna ESP32-S2-MINI-1U – IPEX antenna connector Dimensions ESP32-S2-MINI-1 – 20 x 15.4 x mm ESP32-S2-MINI-1U – 15.4 x 15.4 x mm The company states the exact processor SKU used in the module is ESP32-S2FH4, but initially I could not find out it differed from ESP32-S2 since it has the same specs include a single-core processor, ULP core, up to 43 GPIOs, and USB-OTG support. It turns out the flash appears to be embedded inside the ESP32-S2F processor instead of being […]
LilyGO has launched a fair amount of ESP32 boards with some less common features like Ethernet and OLED Display, cellular connectivity, LoRa & GPS, PoE, watch form factor, and more. Their latest product is somewhat different from their earlier boards with the TTGO Heart rate programming development kit being closer to a reference design since it comes with an enclosure similar to commercial products. The heart rate devkit features ESP32 WiFi and Bluetooth SoC, a small LCD, as well as a Maxim Integrated MAX30102 pulse oximeter and heart-rate sensor. TTGO heart rate development kit specifications: SoC – Espressif Systems ESP32 dual-core Tensilica SoC with WiFi 4 & Bluetooth connectivity Display – 0.96-inch IPS LCD via ST7735 SPI controller Sensors MAX30102 heart rate blood oxygen I2C sensor MPU6050 6-axis accelerometer and gyroscope (I2C) Debugging – Micro USB port via CP2104 USB to TTL bridge Misc -PCF8563 RTC, user button Battery – 200 mAh; charging voltage and current: 5V, 500mah via […]
LilyGO TTGO T-Watch K210 AIOT is a rather thick watch development kit based on Kendryte K210 RISC-V AI Processor and ESP32 WiSoC capable of performing AI workloads such as face detection using a USB power source. We first covered the development kit in June, and the company releases some small variants from time to time with the latest being TTGO Handheld T-Watch K210 with basically the same hardware, plus the addition of a handle that adds a power button, and a compartment for a 9V battery to power the watch/devkit. TTGO Handheld T-Watch K210 specifications: SoC – Kendryte K210 dual-core 64-bit RISC-V processor with 8MB RAM, AI accelerators Storage – 16MB flash, MicroSD card slot Display – 1.54-inch capacitive touch IPS screen connected over an 8080 interface Camera – Adjustable 2MP OV2640 sensor with 65-degree lens (optional 120-degree angle lens), AS312 “human” infrared sensor Connectivity – 2.4 GHz 802.11b/g/n WiFi and Bluetooth via ESP32 SoC over SPI/UART connection to K210 […]
Espressif Systems & Amazon have recently announced ESP32-PICO-V3-ZERO Alexa Connect Kit (ACK) module providing out-of-box connectivity to ACK cloud services, support for features such as Alexa control, “Frustration-Free Setup” and Amazon Dash replenishment for connected devices. The tiny (23 x 16 x 2.3mm) module is based on the company’s ESP32-PICO-V3 System-in-Package (SiP) based on ESP32-V3 dual-core Xtensa LX6 WiFI and Bluetooth SoC, a 4 MB SPI flash, a crystal oscillator, filter capacitors, and an RF matching network. The module supports 2.4 GHz 802.11 b/g/n WiFi, Bluetooth, and Bluetooth Low Energy connectivity and comes with a PCB antenna and a u.FL connector to plug in an external antenna [Update: That should be an RF test connector instead, see comments]. ESP32-PICO-V3-ZERO module interfaces to a host MCU through a UART interface, and to speed-up time-to-market the module comes pre-certified for regulatory certifications such as FCC, CE, SRRC, IC, and RCM. The module comes pre-programmed with the ACK module firmware managed by Amazon […]
If you like tiny boards with Ethernet, TTGO T-Lite W5500 development board may be an interesting option, as the ESP32 board comes with a built-in OLED, and female headers to connect an Ethernet add-on board called W5500 Gateway Module. LilyGO TTGO T-Lite W5500 specifications: SoC – Espressif System ESP32 dual-core WiFi and Bluetooth SoC with 520KB SRAM Storage – 4MB flash Display – 0.96-inch OLED display (SSD1306 driver) Connectivity 802.11 b/g/n WiFi 4 up to 150 Mbps, and Bluetooth 5.x BR/LE via ESP32 SoC, on-board ceramic antenna or external antenna (selectable with a resistor?) Optional Ethernet via SPI Ethernet board based on Wiznet W5500 USB – 1x USB Type-C port for power and programming via CP2104 USB to TTL chip I/Os 8+6 through holes with GPIOs, SPI, ADC, Touch, 5V, 3.3V, GND Operating voltage – 2.7V-3.6V Misc – Boot & Reset button, 40MHz crystal oscillator Power Supply – 5V/1A via USB-C port Temperature range – -40°C ~ +85°C Dimensions – […]
ControlBits EMIT (Environmental Monitoring for the Internet of Things) is a baseboard compatible with DOIT ESP32 DevKit V1 development board and equipped with a temperature and humidity sensor, a relay, a 12-pinGPIO connector, and a MicroSD card. EMIT ESP32 IoT development board specifications: Socket for DOIT ESP32 DevKit v1 board with WiFi and Bluetooth LE connectivity Storage – MicroSD card socket Sensor – AM2302 temperature & humidity sensor with -40° to +80° C and 0 to 99.9 %RH ranges. Relay – 5A SPST relay output with status LED Expansion – 12-pin GPIO header Misc – 2x programmable status LEDs (red & green) Power Supply – 5V via USB on ESP32 board, or external 7-12 V supply via terminal block Dimensions – 81 x 81 mm (PCB only) The board comes with mounting holes so it can be wall-mounted, and an optional enclosure is also available. Some applications for the board include smart greenhouse controller, a central heating thermostat, an environmental […]
One of the advantages of the new ESP32-S2 processor is that it offers a USB OTG interface. So far few boards took advantage of the extra interface, and one of the rare ones is Cucumber ESP32-S2 board with a USB-C OTG port. There’s another option with a slightly unusual form factor thanks to Stetel Things’ Maia ESP32-S2 development board with the typical USB-C port for power and debugging, plus a micro USB OTG port, and a small prototyping area. Maia ESP32-S2 development board specifications: SoC – Espressif System ESP32-S2 single-core LX7 processor at up to 240 MHz with an ultra-low-power (ULP) RISC-V CPU, 320KB RAM Storage – 4MB flash Connectivity – 802.11b/g/n WiFi 4 with on-board PCB antenna USB 1x Micro USB OTG port for data and power 1x USB-C port for programming (virtual UART) and power Expansion 24-pin I/O header “Playground” prototyping area with 4x 18 through holes including columns for GND and 3.3V Debugging – Console via USB-C […]
TASMOTA open-source firmware was initially designed for ESP8266 or ESP8285 based Sonoff home automation devices providing an alternative to eWelink firmware with support for MQTT protocol allowing integration with home automation frameworks like Domoticz or openHAB. It has since then expanded to support hardware from various brands, but until recently you were still limited to products with ESP8266 or ESP8285, and ESP32 was not supported. The good news is that TASMOTA has now gotten experimental support for ESP32 boards and products such as TTGO T-Camera. You’ll find basic documentation and well as Tasmota ESP32 (aka Tasmota32) firmware files for LilyGO TTGO T-Camera board, displays, and I2C sensor on Tasmota Github.io website. The ESP32 port is based on Jörg Schüler-Maroldt’s work. PuceBacoon also found other ESP32 boards in the source code including Olimex ESP32-PoE board in xdrv_82_ethernet.ino file and “AI Thinker” cameras in xdrv_81_webcam.ino. If you’d like to give it a try you can either download Tasmota32 firmware or built it […]
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