Support for Etekcity ESF24

[p-doyle]

*Etekcity ESF24 https://www.etekcity.com/product/100325 https://play.google.com/store/apps/details?id=com.etekcity.health&hl=en_US

Step 1: Read the general reverse engineer process

• [y] I have read the how to reverse engineer a Bluetooth 4.x wiki entry

Step 2: Acquiring some Bluetooth traffic

1. Bluetooth HCI Snoop log file user settings in the vendors app:

sex: male
height:  6'1"
age: 29

measured true values in the vendors app for the 1. HCI Snoop log file:

78.25 kg

btsnoop_hci.log

Step 3: Discover Bluetooth services and characteristic

openScale_2020-02-25_15-28.txt

[oliexdev]

Please do step 2 probably your scale doesn't use only the weight. Also we need it three times.