https://github.com/ratopi/ahoydtu-howto

See http://ratopi.github.io/ahoydtu-howto/ for a nicely rendered version.
https://github.com/ratopi/ahoydtu-howto

ahoy ahoy-dtu dtu electronics esp esp8266 esp8266-arduino hoymiles nodemcu nodemcu-arduino nodemcu-esp8266 nrf24l01 wechselrichter

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• Host: GitHub
• URL: https://github.com/ratopi/ahoydtu-howto
• Owner: ratopi
• Created: 2024-02-17T10:52:48.000Z (9 months ago)
• Default Branch: master
• Last Pushed: 2024-02-18T09:22:32.000Z (9 months ago)
• Last Synced: 2024-02-18T12:23:47.747Z (9 months ago)
• Topics: ahoy, ahoy-dtu, dtu, electronics, esp, esp8266, esp8266-arduino, hoymiles, nodemcu, nodemcu-arduino, nodemcu-esp8266, nrf24l01, wechselrichter
• Homepage: http://dev.ratopi.de/ahoydtu-howto/
• Size: 15.6 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.adoc

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README

        
:toc: left

= Howto install AhoyDTU on ESP8266

Currently there is nofootnote:[AFAIK.]footnote:[Due to a bug in the former documentation for ESP8266.]

documentation in https://github.com/lumapu/ahoy[AhoyDTU] howto wire up with a NodeMCU based on an ESP8266.

Therefore some more information here.

== Hardware

Needed:

* ESP8266 (i.e. NodeMCU) - Microcontroller

* NRF24L01+ - Wireless transceiver module footnote:[The "\+" version is needed, because the communication happen with 250 kbps.]

Optional

* 100µF Capacitor beetween GND and VCCfootnote:[Electrolytic capcacitors have polarization. Therefore, connect it in the correct way. The ElCo has a "-" or "+" printed on its cover.] - as closefootnote:[This capacitor is buffering out power peaks of the transceiver module during send and receive; and therefore stabilizes the power for the microcontroller.] as possible to the transceiver module.

== Connections

|===

| Signal   | GPIO | Pin footnote:[Pin on NodeMCU DevKit standard module.] | Color ISO (DIN)footnote:[The color of the wires doesn't matter. ;-)]

| CS/CSN   | 15   | D8   | OG (or)

| CE       |  0   | D3   | BN (br)

| IRQ      |  2   | D4   | BU (bl)

| MISO     | 12   | D6   | GN (gr)

| MOSI     | 13   | D7   | VT (vi)

| SCK/SCLK | 14   | D5   | YE (ge)

| GND      | -    | GND  | BK (sw)

| VCC      | -    | 3.3V | RD (rt)

|===

The pins for CS, CE and IRQ can be specified via the WebGUI.

The pins for MISO, MOSI and SCLK are specified in the https://github.com/lumapu/ahoy/blob/main/src/config/config.h[config.h] (currently starting at line 145).

=== Pin Layout of NRF24L01+

Seen from below, socket on the left.

|===

| MISO | IRQ

| SCK  | MOSI

| CE   | CSN

| GND  | VCC

|===

== Software

To install AhoyDTU on ESP8266:

* download the newest binaries from https://github.com/lumapu/ahoy/releases,

* unzip it,

* upload the binary with `esptool` footnote:[On debian just do an `apt install esptool`.] to you ESP.

Example for upload:

	`esptool write_flash 0x0 ahoy_v0.8.36/ESP8266/231230_ahoy_0.8.36_6fb0535_esp8266.bin`

If you like to watch serial output, you may use screen for that:

	`screen /dev/ttyUSB0 115200`

== Mistakes

If you find an erros in this documentation please feel free to add an  https://github.com/ratopi/ahoydtu-howto/issues[issue].