This post discusses ESP32 IDF STPM32/33 SPI Issue and its solution, There are lot of issues reported on GitHub and aurdinio forum. Well ESP32 is from Espressif Systems and is a popular IoT controller used in embedded systems. While COVID-19 had accelerated most of the touchless and wireless features in any sort of product, these controllers like ESP32, ESP8266 had proven their time to market. In our product, While using SPI of ESP32, We are using esp32 wroom32. In our Smart Meter IoT Application Software, we need to read the internal registers of STPM32/33. As ESP32 is interfaced with STPM32/33- a popular metering module - over SPI. For that purpose, we are using SPI protocol. STPM32/33 has SPI peripheral which