There seems to be a problem with availability of the ESP8266 module we have chosen. We want to use the ESP-7, but no one seems to be able to have it.
There are questions about the possible use of ESP-12, but the problem is, that the ESP-12 does not have an antenna connector. We plan on using an external antenna connected with an IPEX connector.
Out of 15 contacted companies, we have received offers from 5. Very welcome surprise is the 2nd place in terms of overall price from company from Slovakia 🙂