I’m trying to make a device like a Star Trek Communicator for “communicating” with my Home Assistant.
I know most people use digital microphones, and I may try that too, but I have reasons to really want to use the internal ADC, for example for AGC. So this post is ONLY about using the internal ADC.
It’s strange (to me) that the only place the internal ADC is mentioned/configured is on the I2S page here:
https://esphome.io/components/microphone/i2s_audio.html.
AND that even when specifying “adc_type: internal” it’s still inside a “platform: i2s_audio” block which also requires another block specifying the I2S pins, but I thought I’d try it anyway; here is what I got:
Please note that I did wrap the code within but for some reason the format checker still states that I didn’t; I’m unsure what to do. I tried two browsers: Vivaldi and Edge. Edit: It seems that even though it complains, it formats it right… am I missing something?
i2s_audio: #It seems I2S Audio is needed even for ADC Microphone and requires pins' setting
i2s_lrclk_pin: GPIO33
i2s_bclk_pin: GPIO19
microphone:
- platform: i2s_audio
id: adc_mic
adc_type: internal
adc_pin: GPIO35
voice_assistant:
microphone: adc_mic
binary_sensor:
- platform: gpio
id: voice_switch
pin:
number: GPIO14
inverted: true
mode:
input: true
pullup: true
on_press:
- voice_assistant.start:
on_release:
- voice_assistant.stop:
Even without a microphone connected I would expect the “Assist in progress” indicator to turn ON and stay ON as long as I keep the button pressed.
Instead, when I press/hold the button the “Assist in progress” indicator flickers on then goes off imediately.
The only reason I can think of (barring having missed something entirely) is that the board tries to read the I2S port and there’s nothing there (clk) so it stops immediately.
I am unsure if at this point I should have configured anything in HA other than a “Card” in the Overview.
Should I have added some automations, scripts of any sort?
Thank you
I made good progress, and for a while it worked quite well.
Then I didn’t use it for a while; I concentrated on getting the speech recognition to work with GPU. That works well in one of the many ways I tried, but now when I try to use my ESP32 device, The Voice Assist does not start even though I can see (in HA GUI) that the switch is recognized as pressed.
What can be wrong?
Thanks.
Could you please share your progress and sample code for ADC mic in ESPHome? Or does it work with your previous code? I have several ADC mics to try now. Thanks. 
P.S. also, did you use S3 or regular WROOM?
Sorry, I just saw this. No S3, just regular.
# Info from: https://github.com/techdregs/Home-Assistant-Voice-Remote
# Some Speaker info from: https://community.home-assistant.io/t/strange-esphome-behavior-w-voice-and-esp32/642265
# Assist switch on GPIO14 (PTT)
esphome:
name: espvoice1
friendly_name: ESPvoice1
on_boot:
- priority: -100
then:
- wait_until: api.connected
- delay: 5s
# - media_player.play_media: 'http://192.168.0.xx:xxxx/AssistantOn.mp3' # I don't think this ever worked
esp32:
board: esp32dev
logger: # Enable logging
baud_rate: 115200
level: DEBUG
api: # Enable Home Assistant API
encryption:
key: "xxx"
ota:
password: "xxx"
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
fast_connect: on
ap: # Enable fallback hotspot (captive portal) in case wifi connection fails
ssid: "sdsdsdvcvzcv"
password: "sdsdfsdsdsd"
manual_ip:
static_ip: 192.168.0.xxx
gateway: 192.168.0.1
subnet: 255.255.255.0
dns1: 1.1.1.1
dns2: 8.8.8.8
i2s_audio:
i2s_lrclk_pin: GPIO15 # MIC-WS SPK- LRC
i2s_bclk_pin: GPIO17 # MIC-SCK SPK- BCLK
microphone:
- platform: i2s_audio
i2s_din_pin: GPIO27 #sd
id: inmp441_mic
adc_type: external
pdm: false
#speaker:
media_player:
- platform: i2s_audio
id: big_speaker
name: ESPvoice1 Media Player
dac_type: external
i2s_dout_pin: GPIO16 #DIN
mode: mono
on_pause:
- media_player.stop
voice_assistant:
microphone: inmp441_mic
media_player: big_speaker
on_listening:
- light.turn_on: response_light
on_end:
- light.turn_off: response_light
binary_sensor:
- platform: gpio
id: voice_switch
name: Voice Switch
pin:
number: GPIO14
inverted: true
mode:
input: true
pullup: true
on_press:
- media_player.stop
- voice_assistant.start:
on_release:
- voice_assistant.stop:
light:
- platform: binary
id: response_light
name: "Assisting LED"
output: onboard_led
output:
- id: onboard_led
platform: gpio
pin: GPIO22
inverted: true
captive_portal:
Well, your ADC is external. So you have proper i2s mics. I have them too, but also I got several mics with just VCC, gnd and analog out. I guess I need to use internal ADC for this, but I tried and didn’t get voice recognition, so thought maybe I did something wrong. That’s why I asked for your setup. Sorry!
I sometimes get help from Bing; you should try. Give it the file for digital mic and ask it to change it for analog.
Of course, you need a mic with preamp.