Espressif Category - Page 78 of 94 - CNX Software

March 28, 2018January 17, 2019 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Real Time Logic Releases Web-based SharkSSL FreeRTOS/lwIP ESP8266 IDE

Real Time Logic claims SharkSSL is the smallest, fastest, and best performing embedded TLS v1.0/1.1/1.2 solution. It works with ColdFire, Kinetis K60, all the Cortex-M3 and -M4 processors, as well as Tensilica LX3 based ESP8266. The solutions can be tuned via compile-time options to a less than 20kB footprint that still supports full x.509 authentication. SharkSSL is a commercial solution, but the SDK is free to use for non-commercial projects. In order to simplify development on ESP826, the company has released the SharkSSL ESP8266 IDE running in a virtual machine, and providing a complete FreeRTOS and lwIP based development environment using a web based interface. Once you’ve downloaded the virtual machine image, you can start it in VirtualBox or VMWare with bridged networking enabled. The IP address of the virtual machine will be shown in the console, and you can use it in your favorite web browser in the host […]

March 14, 2018 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

ESP32-WROOM-32D / ESP32-WROOM-32U WiFi & Bluetooth Modules Deliver Better RF Performance

ESP-WROOM-32 is likely the most popular ESP32 WiFi + Bluetooth module on the market, but a few months ago, Espressif Systems unveiled two variants named ESP32-WROOM-32D / ESP32-WROOM-32U, which are based on ESP32-D0WD (5x5mm package) instead of ESP32-D0WDQ6 (6x6mm package), and are said to offer better RF performance ESP32-WROOM-32D is the most similar to ESP-WROOM-32 since it also comes with a PCB antenna, while ESP32-WROOM-32U is much smaller as it relies on an external WiFi/Bluetooth antenna via a u.FL connector. Both new modules are pin-to-pin compatible with ESP-WROOM-32 Key features: CPU – Espressif ESP32-D0WD dual core Tensilica processor Storage – 32Mbit SPI flash Crystal – 40 MHz Connectivity – Wi-Fi 802.11 b/g/n up to 150 Mbps, Bluetooth 4.2 LE I/Os – 38- catellagated pin with I/Os + GND plane Antenna ESP32-WROOM-32D – on-board antenna ESP32-WROOM-32U – u.FL connector for external IPEX antenna Dimensions ESP32-WROOM-32D – 18 x 25.5 x 3.1 […]

March 9, 2018March 9, 2018 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

ALB32-WROVER is an ESP-WROOM-32 Compatible Module with 32 Mbit PSRAM, up to 128 Mbit Flash

ESP-WROOM-32 is one of the most commonly ESP32 WiFi + Bluetooth module, and does the job for many applications. However, it only includes 4MB (32Mbit) flash, and no external PSRAM, while Espressif ESP32 chip itself supports up to 128 Mbit (16MB) NOR flash and up to 32Mbit (4MB) PSRAM, so for applications demanding more resources (e.g. MicroPython), or for initial development it would good to have a module maxing out memory and storage capabilities of the chip. Analog Lamb ALB32-WROVER does exactly that with 32 Mbit PSRAM, and 32 to 128 Mbit flash, in a form factor compatible with ESP-WROOM-32 module. ALB32-WROVER specifications: WiSoC – Espressif ESP32 (Rev0?) Wi-Fi and Bluetooth combo chip External Memory – 32Mb PSRAM Storage – 32, 64, or 128Mbit Flash Dimensions – 18 x 25 x 3 mm Compatible with ESP-WROOM-32, except for GPIO16 & 17 (used for PSRAM) It’s very odd the company claims the […]

March 4, 2018March 4, 2018 by Karl Johnson - 14 Comments

Sonoff S31 Smart Socket Review – Power Consumption Monitoring with eWelink Android App

Today we are looking at the Sonoff S31. It is another device in the Sonoff line by ITEAD Studio. Similar to the Sonoff POW, you can see power usage but on the S31 you can keep historical data up to 100 days. This time around I am using it with the standard firmware, and will not be flashing the popular MQTT Tasmota firmware. Specifications per ITEAD website: Max. Current: 16A Voltage Input: 90~264V AC, 50/60HZ Wireless Standard: 2.4GHz, 802.11 b/g/n Receive Sensitivity: 802.11b: <-84dBm(11Mbps); 802.11g: <-68dBm(54Mbps) Output Power: 802.11b:16±2dBm; 802.11g:13±2dBm Security Mechanism: WEP/WPA-PSK/WPA2-PSK Encryption: AES/TKIP Working Temp: -20 °C ~ 75 °C Working Humidity: 10%-80% Product Dimensions: 75.7×39.7x32mm Gang: 1 Weight: 135g Certification: FCC (Download) Sonoff S31 Unboxing & Teardown Taking the S31 apart is rather easy but I did not take it fully apart for fear of breaking it. Just pop the power button off the left side. Then […]

February 22, 2018 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

3D Rendering and Video Composite Output on ESP32 Boards

A few years ago, we already saw it was possible to transmit color signals over NTSC using an ESP8266 board with the signal received on a TV with an analog tuner. CNLohr had to connect an antenna to the I2S pin of his ESP8266 module, and disable WiFi. But surely we should be able to do the same with ESP32, and potentially even better thanks to the two cores. That’s exactly what Bitluni successfully managed by connecting his LoLin32 board to the composite input of his TV with one handling the TV signal output (in grayscale) and the other core rendering 3D objects in real-time. But any ESP32 board could be use instead. The hardware connection is very easy. We just need two wires, one connected to the GND pin and outer part of the RCA connector, and the other connected to GPIO 25 (DAC1) and the inner part of […]

February 18, 2018February 18, 2018 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

A First Look at ESP32-LyraTD-MSC Audio Mic HDK with Baidu DuerOS Assistant

Earlier this year, Espressif Systems had unveiled their ESP32-LyraTD-MSC Audio MiC HDK (Hardware Development Kit) which features an ESP32-WROOM module, a 4-mic array DSP, 3 microphones, an audio jack, and various I/Os. I received the board a couple of weeks ago, and while there’s no public information released yet, the company provided me with ESP32-LyraTD-MSC User Guide in English. Eventually, I’d expect Google Assistant and Amazon Alexa to be supported, but in the meantime I had to leverage my (lowly) Chinese language skills to get started since the kit is pre-loaded with firmware connecting to Baidu DuerOS voice assistant. ESP32-LyraTD-MSC Unboxing The kit came in a bland Espressif Systems carton box. Inside the package, I could only find one kit comprised of two boards. The bottom board read ESP32_MicrosemiDSP_Mainboard-V1, and does not show much apart from marking for connectors, headers and the power switch. While the top comes with eight […]

February 14, 2018February 14, 2018 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

CAN32 ESP32 Development Board is Designed for CAN Bus Applications

If you want a WiFi + BLE board to play with CAN bus, one option is to go with the versatile Olimex ESP32-EVB Board, but if you need something more compact CAN32 board might be worth a look as the board is specifically designed for projects and testing of the ESP32 in a CAN-BUS environment. CAN32 board hardware specifications: Wireless module – Espressif Systems ESP32-WROOM WiFI + Bluetooth LE module External storage – micro SD slot CAN Bus chip – Texas Instruments SN65HVD230DR CAN-BUS transceiver with sleep mode Expansion Unpopulated headers exposing: SVP/SVN, GPIOs, I2C, UART, GND, 3.3Vm 5.0V 4 larger vias for CAN H and L, 12V (max 15V), and GND Debugging / Programming – micro USB port via Silicon Labs CP2102N USB to UART Misc – C&K soft-touch low-profile buttons for reset and boot; 4x LEDs for power, ESP, UART Tx/Rx Power Supply 5V via micro USB port […]

February 14, 2018February 14, 2018 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Particle Unveils Three nRF52840 Bluetooth 5 Boards: Argon (WiFi), Boron (LTE), and Xenon, as well as Particle Mesh Technology

In the last year or so, Bluetooth has gotten an upgrade with the release of Bluetooth 5. The new protocol works on several existing platforms, but if you want support for the full set of Bluetooth 5 features such as longer range and higher bandwidth, we’ve seen you need a recent chip such as Nordic Semi nRF52840. However so far, AFAIK you had to buy Nordic Semi own development kit for play with nRF52840, and now Particle has announced not one, but three low cost development boards powered by nRF52840 chip starting at just $9, and supporting their newly announced Particle Mesh technology. So for some reasons, it appears they did not go with Bluetooth Mesh. Particle Xenon – Bluetooth 5 + Mesh Xenon is the cheapest model with the following specifications: SoC – Nordic Semiconductor nRF52840 Arm Cortex-M4F 32-bit processor @ 64MHz with 1MB flash, 256KB RAM Storage – […]