It is designed primarily for separate control of your heating and stored hot water (S or Y plan). The heating and hot water programmes are independent of each other, giving you the opportunity to operate the system in the most energy-efficient and cost-effective manner.

SPI-based Receivers on Betaflight 4.4.0 and newer will only sync or bind with ExpressLRS 3.x firmwareYou can select a short and simple Binding Phrase for your devices before flashing or updating using the field in the ExpressLRS Configurator. Older Radios or those with only one Menu Key will need to long-press the Menu Key to access the System Menu. The ESi Controls 2 Channel Programmer offers flexibility and reliability for use in any domestic heating and hot water installations. The ES2247B is a twin channel multi purpose programmer, designed for separate control of your heating and stored hot water. The heating and hot water programmes are independent of each other, giving you the opportunity to operate the system in the most energy efficient and cost effective manner.

If the ExpressLRS Lua Script is showing a C in the top-right corner alright, but then that line disappears and is replaced with a line saying "Model Mismatch", do not worry. ExpressLRS has detected that the set Model ID in the Receiver is different from the Receiver ID set in the current Model in your Radio Model Configuration. If the other UART is occupied by another peripheral, disconnect it and swap places with the Receiver. a TX Module with version string of 3.2.0 will NOT sync or bind with a Receiver with firmware version 2.4.0The ES2247B is a two channel multi purpose programmer with the flexibility of two or three on/off timings per day and can be configured for 7 day, 5/2 day or 24 hour operation for independent channels (all within the one unit), allowing one product to suit all installations alleviating any potential of incorrect selection. Selecting the most suitable type of Heating Control is an important decision. Once you determine that Programmers & Time Switches are the best solution then the ESi 2 Channel Multi-Purpose Programmer - ES2247B is assuredly worth factoring in to your final decision. a TX Module with version string of 3.1.2 will sync and work with a Receiver with firmware version 3.0.1

If it starts Blinking Slowly (500ms Blink Pattern), you will need to move the receiver wiring to a different UART. A C in the top-right corner should be visible indicating TX module and Receiver are connected and Communicating. If there is no other Full UART, you can try wiring a Pull-up Resistor: Connect a Resistor (300 Ohm to 1k Ohm value; a lower value is more effective) between this UART's RX pad and either a 5v or 3.3v pad as shown below: Binding can be done with either a hard-coded unique Binding Phrase or in a more traditional way where you put the receiver and transmitter into bind mode, and they link up.It is designed primarily for separate control of your heating and stored hot water (S or Y plan). The heating and hot water programmes are independent of each other, giving you the opportunity to operate the system in the most energy efficient and cost effective manner. Records the default button state of the corresponding category & the status of CCPA. It works only in coordination with the primary cookie. You are now in the Tools Menu where Lua Scripts can be found. Scroll down and select ExpressLRS Lua Script. SPI-based Receivers on (official) Betaflight 4.3.1 and older will only sync or bind with ExpressLRS 2.x firmware However you say "Turned the thermostat right down but heating stayed on." which does not seem to point to the programmer.