ESP32 processor can support PSRAM, and so far I had seen boards or modules with up to 4MB RAM, but if you need more memory, Espressif Systems has now launched ESP32-WROVER-B module with 8MB SPI PSRAM.
ESP32-WROVER-B module specifications:
- WiSoC – Espressif ESP32-D0WD with dual core processor up to 240 Mhz; 5x5mm package
- Connectivity
- 2.4GHz WiFi 802.11 b/g/n up to 150 Mbps
- Bluetooth 4.2 LE
- Two antenna designs: PCB antenna or IPEX connector
- External Memory – 8MB SPI Pseudo Static RAM (PSRAM)
- Storage – 4MB external SPI flash
- I/Os – Capacitive touch, SD card interface, Ethernet, SPI, UART, I2S, I2C, GPIOs, VP/VN, etc…
- Power Supply – 2.7 to 3.6V
- Dimensions – 31.4 x 18.0 x 3.3 mm
- Certifications – FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC
ESP32-WROVER-B should be software compatible with other ESP32 modules. It works ESP-IDF framework based on FreeRTOS with LwIP ( light-weight Internet Protocol). TLS 1.2 hardware acceleration is built-in, and secure OTA firmware upgrade is supported. You’ll find more technical details in the datasheet.
I could only find it for sale on Mouser right now, where it goes for $4.20 per unit (minimum order 650 pieces), but it should soon pop-up on most stores where you can purchase other ESP32 modules.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
Anyone know why they don’t have a version with a larger FLASH? I know they have limitations on how much they can map as executable, but the currently mapped segment can be changed can it not?
The versions with 4MB, 8MB and 16MB of Flash ( + 4 MB SPIRAM) are available:
https://www.electrodragon.com/product/esp32-wrover-v4-module-based-esp32/
As the first paragraph mentioned above, there are ALB32-WROVER modules from AnalogLamb with more flash.
I bet other companies such Lolin will provide some too in following months.
Are there any good ARM alternatives to the ESP32 or ESP8266? I remember some where in the pipeline a year or more ago – but they seem to be all DOA
There’s RTL8710AF @ https://www.cnx-software.com/2016/08/18/getting-started-with-bt-rtl-00-rtl8710-module-serial-console-at-commands-and-esp8266-pin-to-pin-compatibility/
It’s clearly not as popular as ESP8266 / ESP32, but you can still purchase it, and develop projects around it.
Yeah, I remember that one. Looking at the RTL8710 forums – it’s dead 🙁
Thanks for testing it and doing that writeup
Yes, I was subscribed to the RSS feeds for rtl8710forum but I had to remove it from Thunderbird recently due to excessive spam…
The Chinese bbs (IoT-now) appears to be dead too (not accessible), but there’s some limited activity in PADI IoT forums @ https://forum.pine64.org/forumdisplay.php?fid=57
Oh right! I forgot about the Pine version – and yeah the forums are still going. I think I’ll need to look into this further 🙂 . And I saw your articles on the PADI – very useful stuff! Thanks again