ESP32 has 3 different SPI interfaces, for user available only 2 – HSPI and VSPI. For modules with SPI RAM (PSRAM) interface VSPI is not available as used by PSRAM chip.
Table below has native pinouts for HSPI and VSPI interfaces
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Category: Hardware
VoCore2 – Pinouts and specifications
VoCore2 – is a very interesting board for IoT solutions that based on SoC MT7628AN.
OrangePi 4G IoT — review single-board computer for IoT with LTE
OrangePi 4G IoT. Source: orangepi.org
On the market came a new board for the Internet of things – OrangePi 4G IoT! In this review, we will take a closer look at the nuances of launching the board, software support and how much the board meets the expectations.
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Omega2 Plus (Omega2+) – краткий обзор
Omega2 Plus – маленький одноядерный компьютер на Linux (OpenWRT/LEDE). Интересен он наличием внешних пинов (GPIO), шинами I2C, I2S, SPI, Ethernet и, конечно же, своей ценой. Официальная цена – 9$, но доставка может стоить свыше 50% в зависимости от региона доставки. Рассмотрим подробнее запуск модуля и его изначальную программную начинку.