Instable - Wifi disconnect when card reading

[iambusdi]

Hi, first of all – thank you for this very cool project! I'm currently building a device for my kids' room and really enjoy working with it.

I’ve soldered all the parts and assembled everything into the 3D model you offered on ko-fi. In my workspace, the setup works perfectly. However, I'm encountering a strange issue when I move the device to my kids’ room:

🛠️ Problem Description When I place an NFC card on the reader, the music playback starts as expected – but then the Wi-Fi connection drops until I remove the card again. During this time:

• The music continue playing.
• Volume control doesn’t work either (due to the missing Wi-Fi connection, I assume).

To investigate further, I added a simple Wi-Fi signal quality sensor to the code. Here are the signal strengths I observed: workspace: ~ -60 dB Kids’ room: ~ -70 dB Both values seem relatively stable, though a bit weaker in the kids’ room.

Also the ping (every 1s) is gone and higher after removing the card for some time:

64 bytes from : icmp_seq=27179 ttl=64 time=84.394 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27180 ttl=64 time=102.638 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27181 ttl=64 time=9.436 ms      <- add card
Request timeout for icmp_seq 27182
....
Request timeout for icmp_seq 27209                                                      <- remove card
64 bytes from xx.xx.xx.xx: icmp_seq=27183 ttl=64 time=27819.006 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27184 ttl=64 time=26820.371 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27185 ttl=64 time=25815.771 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27186 ttl=64 time=24810.971 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27187 ttl=64 time=23814.802 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27188 ttl=64 time=22812.565 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27189 ttl=64 time=21808.458 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27190 ttl=64 time=20806.192 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27191 ttl=64 time=19804.780 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27192 ttl=64 time=18800.879 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27202 ttl=64 time=8845.367 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27211 ttl=64 time=103.726 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27212 ttl=64 time=116.920 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27213 ttl=64 time=144.283 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27214 ttl=64 time=54.370 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27215 ttl=64 time=2.547 ms
64 bytes from xx.xx.xx.xx: icmp_seq=27216 ttl=64 time=4.746 ms

❓ Do you have any idea how to solve this issue? Do you have any ideas what could cause this issue – especially the Wi-Fi disconnect triggered specifically by placing the NFC card? Could it be interference, shielding, or maybe power-related (tested different usb charger up to 10W)? I am using this esp32 mini USB-C version. https://www.amazon.de/dp/B0D7V9591B?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

Thank you for your support!

🔧 Optional: Wi-Fi Quality Sensor Code If you're interested in adding a similar Wi-Fi signal check to your project, I based mine on the following config: https://github.com/jcallaghan/esphome-config

config file:

sensor:
  - <<: !include ../sensors/wifi_signal_percentage.yaml
  - <<: !include ../sensors/wifi_signal.yaml
    on_value:
      - component.update: sensor_wifi_signal_percentage

text_sensor:
  - <<: !include ../text_sensors/wifi_info.yaml

wifi_signal_percentage.yaml

---
# WiFi Signal Percentage Sensor
#
# A template sensor that calculates the Wi-Fi Signal Strength as a percentage.
#
# This template doesn't update by itself. It is used by:
# common/wifi.yaml
#
# https://esphome.io/components/sensor/wifi_signal.html
#
platform: template
id: sensor_wifi_signal_percentage
name: "WiFi Signal Percentage - ${name}"
icon: "mdi:wifi"
unit_of_measurement: "%"
update_interval: never
lambda: |-
  if (id(sensor_wifi_signal).state) {
    if (id(sensor_wifi_signal).state <= -100 ) {
      return 0;
    } else if (id(sensor_wifi_signal).state >= -50) {
      return 100;
    } else {
      return 2 * (id(sensor_wifi_signal).state + 100);
    }
  } else {
    return NAN;
  }

wifi_signal.yaml

# WiFi Signal Sensor
#
# The wifi_signal sensor platform allows you to read the signal strength of the
# currently connected WiFi Access Point.
#
# https://esphome.io/components/sensor/wifi_signal.html
#
platform: wifi_signal
id: sensor_wifi_signal
name: "WiFi Signal - ${friendly_name} (${system_id})"
update_interval: 300s

wifi_info.yaml

---
# WiFi Info Text Sensor
#
# The wifi_info text sensor platform exposes different WiFi information via
# text sensors.
#
# https://esphome.io/components/text_sensor/wifi_info.html
#
platform: wifi_info
ip_address:
  name: "IP Address - ${friendly_name} (${system_id})"
ssid:
  name: "SSID - ${friendly_name} (${system_id})"
bssid:
  name: "BSSID - ${friendly_name} (${system_id})"
mac_address:
  name: "MAC - ${friendly_name} (${system_id})"