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Special thanks goes to Gordon.
here you find a newer one https://github.com/jthomperoo/simple-proxy
this was the solution I use long time ago for testing.
After some googeling it seems that there is no official TLS 1.2 AT firmware for ESP01 from Espressif.
Hmm, go for https://www.cdn77.com/tls-test and enter both pages on supported TLS versions
tls & ssl test result for http://www.pur3.co.uk
tls & ssl test result. for djdjeleeisvpd3y-elink.adb.eu-frankfurt-1.oraclecloudapps.com
Edit: AT command 1.x does not support tls 1.2
Sure, better use ESP01 as long they are available. There is are newer version in case of trouble.
Edit: Update at bin to 126.96.36.199
which AT version is used on the ESP8266 for this test?
hi, on esp32 it is detected during boot.
EAN-13 has a checksum digit, is that what you mean? What barcode types are typically used for those cards?
If the display is to small for barcode than think about qrcode.
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