You can refer to PSoC-4-BLE/100_Projects_in_100_Days/Day005_Health_Thermometer at master · cypresssemiconductorco/PSoC-4-BLE · GitHub project which measures ambient temperature using ADC and sends it over the BLE via standard BLE Health Thermometer Profile.
For custom applications, you can use Custom Profile available in BLE componet. Please refer to Application Note and associated code example to understand it's implementation: https://www.cypress.com/documentation/application-notes/an91162-creating-ble-custom-profile
except this there is no other option because all are giving the same
Please let us know where you are getting stuck.
Please share the ADC resolution, ADC configuration parameters, BLE profile etc,. This will help us to get better insights on the issue.