Yes, esp seems to be a great choice in 2019 - more IO, more ram, wifi. Digikey prices for esp8266 start at $ 1.85 https://www.digikey.com/products/en/rf-if-and-

Yes, esp seems to be a great choice in 2019 - more IO, more ram, wifi. Digikey prices for esp8266 start at $ 1.85 https://www.digikey.com/products/en/rf-if-and-rfid/rf-transceiver-ics/879?k=esp8266 https://www.digikey.com/products/en/rf-if-and-rfid/rf-transc... , modules are a dollar more https://www.digikey.com/products/en/rf-if-and-rfid/rf-transceiver-modules/872?FV=ffe00368&quantity=0&ColumnSort=1000011&page=1&k=esp8266&pageSize=25 https://www.digikey.com/products/en/rf-if-and-rfid/rf-transc...