From d15b6ffe676cc52cd4ef30c96f0555ba5f280931 Mon Sep 17 00:00:00 2001 From: Thomas Basler Date: Tue, 11 Apr 2023 23:12:20 +0200 Subject: [PATCH] Doc: Added some remarks regarding the CMT2300A module --- README.md | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index d02dd497..4cb715ab 100644 --- a/README.md +++ b/README.md @@ -118,7 +118,7 @@ Sample Picture: Also supported: Board with Ethernet-Connector and Power-over-Ethernet [Olimex ESP32-POE](https://www.olimex.com/Products/IoT/ESP32/ESP32-POE/open-source-hardware) -### NRF24L01+ radio board +### NRF24L01+ radio board (See inverter table above for supported inverters) The PLUS sign is IMPORTANT! There are different variants available, with antenna on the printed circuit board or external antenna. @@ -137,11 +137,19 @@ A heavily incomplete list of trusted hardware shops in germany is: This list is for your convenience only, the project is not related to any of these shops. +### CMT2300A radio board (See inverter table above for supported inverters) + +It is important to get a module which supports SPI communicatiton. The following modules are currently supported: + +* EBYTE E49-900M20S + +The CMT2300A uses 3-Wire half duplex SPI communication. Due to this fact it currently requires a separate SPI bus. If you want to run the CMT2300A module on the same ESP32 as a NRF24L01+ module or a PCD8544 display make sure you get a ESP which supports 2 SPI busses. + ### Power supply Use a power suppy with 5 V and 1 A. The USB cable connected to your PC/Notebook may be powerful enough or may be not. -## Wiring up +## Wiring up the NRF24L01+ module ### Schematic