diff --git a/esphome/README.md b/esphome/README.md
index 517d883..97151b7 100644
--- a/esphome/README.md
+++ b/esphome/README.md
@@ -11,4 +11,24 @@ $ docker-compose up -d
 $ curl http://127.0.0.1:6052
 ```
 
+## flashing new device
+
+```bash
+$ udevadm info -q property -n /dev/ttyACM0 --property=ID_SERIAL
+$ docker compose exec esphome bash
+>>> cd /config
+>>> esphome ibeacon.yaml run
+====== [SUCCESS] Took 253.61 seconds ======
+INFO Successfully compiled program.
+Found multiple options for uploading, please choose one:
+  [1] /dev/ttyACM0 (USB JTAG/serial debug unit)
+  [2] Over The Air (esphome-esp32c3-ibeacon.local)
+(number): 1
+INFO Successfully uploaded program.
+INFO Starting log output from /dev/ttyACM0 with baud rate 115200
+^C
+>>> ping esphome-esp32c3-ibeacon.lan
+>>> exit
+```
+
 [1]: https://esphome.io/
diff --git a/esphome/data/ibeacon.yaml b/esphome/data/ibeacon.yaml
new file mode 100644
index 0000000..f8be5ea
--- /dev/null
+++ b/esphome/data/ibeacon.yaml
@@ -0,0 +1,40 @@
+#
+# See:
+# - https://esphome.io/components/esp32.html
+# - https://esphome.io/components/esp32_ble_beacon.html
+# - https://registry.platformio.org/platforms/platformio/espressif32/boards
+#
+
+esphome:
+  name: esphome-esp32c3-ibeacon
+  platform: esp32
+  board: dfrobot_beetle_esp32c3
+
+logger:
+
+api:
+  password: !secret api_password
+
+ota:
+  password: !secret ota_password
+
+wifi:
+  ssid: !secret wifi_ssid
+  password: !secret wifi_password
+  domain: .lan
+
+mqtt:
+  broker: broker.hivemq.com
+  port: 1883
+  #username: !secret mqtt_username
+  #password: !secret mqtt_password
+
+esp32_ble_beacon:
+  type: iBeacon
+  uuid: "00000000-0000-0000-0000-000000000000"
+  major: 11111
+  minor: 22222
+  min_interval: 100ms
+  max_interval: 100ms
+  measured_power: -59
+  tx_power: 3
diff --git a/esphome/data/secrets.yaml b/esphome/data/secrets.yaml
new file mode 100644
index 0000000..be96270
--- /dev/null
+++ b/esphome/data/secrets.yaml
@@ -0,0 +1,6 @@
+api_password: secret
+ota_password: secret
+wifi_ssid: OpenWrt
+wifi_password: secret
+mqtt_username: esphome
+mqtt_password: secret
diff --git a/esphome/docker-compose.yml b/esphome/docker-compose.yml
index bcbb491..e3d9e1f 100644
--- a/esphome/docker-compose.yml
+++ b/esphome/docker-compose.yml
@@ -1,9 +1,15 @@
 version: "3.8"
 services:
   esphome:
-    image: esphome/esphome
+    image: esphome/esphome:stable
     ports:
       - "6052:6052"
     volumes:
       - ./data:/config
+    environment:
+      - ESPHOME_DASHBOARD_USE_PING=true
+    ### FOR THE FIRST-TIME ONLY ###
+    #devices:                     #
+    #  - /dev/ttyACM0             #
+    ###############################
     restart: unless-stopped
diff --git a/zigbee2mqtt/README.md b/zigbee2mqtt/README.md
index 61c7c3c..6cc47d6 100644
--- a/zigbee2mqtt/README.md
+++ b/zigbee2mqtt/README.md
@@ -20,7 +20,7 @@ chmod +x cc2538-bsl.py
 ./cc2538-bsl.py --help
 
 ls /dev/ttyUSB*
-udevadm info -q property -n /dev/ttyUSB0 --property=ID_MODEL
+udevadm info -q property -n /dev/ttyUSB0 --property=ID_SERIAL
 ./cc2538-bsl.py --bootloader-sonoff-usb -p /dev/ttyUSB0 -evw CC1352P2_CC2652P_launchpad_coordinator_20230507.hex
 ```