Hello!
To dear client
Thanks for sharing your project.
I am a firmware and PCB expert.
I have wonderful 8+ years experiences in IoT projects using Arduino, ESP8266, BLE, NRF, BT, servo and very familiar with ARM, AVR, PIC.
Particularly, I have a lot of experience in various kinds of sensor application.
For example, It is that temperature & Humidity Sensor results are sent client's Mobile or Web over WiFi, Bluetooth, Zigbee, W/xbee, etc.
I can write PCB, firmware and mobile app for your.
I'm sure that you can get more than you expected because of my skill and hard work.
Let's discuss more with chatting.
Best Regards