This is repo for hardware counterpart for PEKA Virtual Monitor for home use, with WiFi on ESP8266 WeMos.

• WeMos ESP8266:
• Micro OLED shield
• Rotary encoder:

OLED shield over I2C - no jumper - 0x3C

• SCL - D1
• SDA - D2

Rotary

• rotary CLK - D7
• rotary DT - D4
• rotary Sw - D3

Symbol parameter is code for bus/tram stop (street name + direction):

    curl -d "method=getTimes&p0={'symbol':'RKAP71'}" \
         -H "Content-Type: application/x-www-form-urlencoded" \
        -X POST https://www.peka.poznan.pl/vm/method.vm

Sample response (no incoming bus/trams):

    {"success":{"bollard":{"symbol":"SWRZ01","tag":"SWRZ01","name":"Świerzawska","mainBollard":false},"times":[]}}

Sample response with incoming lines:

    {"success":{"bollard":{"symbol":"RKAP71","tag":"RKAP01","name":"Rondo Kaponiera","mainBollard":false},"times":[{"realTime":false,"minutes":13,"direction":"Rondo Kaponiera","onStopPoint":false,"departure":"2019-03-12T00:21:00.000Z","line":"249"},{"realTime":true,"minutes":16,"direction":"Rondo Kaponiera","onStopPoint":false,"departure":"2019-03-12T00:24:00.000Z","line":"232"},{"realTime":true,"minutes":17,"direction":"Rondo Kaponiera","onStopPoint":false,"departure":"2019-03-12T00:25:00.000Z","line":"238"},{"realTime":false,"minutes":22,"direction":"Szwajcarska Szpital","onStopPoint":false,"departure":"2019-03-12T00:30:00.000Z","line":"232"},{"realTime":false,"minutes":22,"direction":"Szwajcarska Szpital","onStopPoint":false,"departure":"2019-03-12T00:30:00.000Z","line":"238"},{"realTime":false,"minutes":22,"direction":"Dębiec","onStopPoint":false,"departure":"2019-03-12T00:30:00.000Z","line":"249"}]}}

Same response, escaped as C++ String:

        String responsePayload = "{\"success\":\{\"bollard\":{\"symbol\":\"RKAP71\",\"tag\":\"RKAP01\",\"name\":\"Rondo Kaponiera\",\"mainBollard\":false},\"times\":[{\"realTime\":false,\"minutes\":13,\"direction\":\"Rondo Kaponiera\",\"onStopPoint\":false,\"departure\":\"2019-03-12T00:21:00.000Z\",\"line\":\"249\"},{\"realTime\":true,\"minutes\":16,\"direction\":\"Rondo Kaponiera\",\"onStopPoint\":false,\"departure\":\"2019-03-12T00:24:00.000Z\",\"line\":\"232\"},{\"realTime\":true,\"minutes\":17,\"direction\":\"Rondo Kaponiera\",\"onStopPoint\":false,\"departure\":\"2019-03-12T00:25:00.000Z\",\"line\":\"238\"},{\"realTime\":false,\"minutes\":22,\"direction\":\"Szwajcarska Szpital\",\"onStopPoint\":false,\"departure\":\"2019-03-12T00:30:00.000Z\",\"line\":\"232\"},{\"realTime\":false,\"minutes\":22,\"direction\":\"Szwajcarska Szpital\",\"onStopPoint\":false,\"departure\":\"2019-03-12T00:30:00.000Z\",\"line\":\"238\"},{\"realTime\":false,\"minutes\":22,\"direction\":\"Dębiec\",\"onStopPoint\":false,\"departure\":\"2019-03-12T00:30:00.000Z\",\"line\":\"249\"}]}}";

Getting fingerprint:

    echo | openssl s_client -connect peka.poznan.pl:443 | openssl x509 -fingerprint -noout

As for writing this doc, it returns:

    BA:ED:B9:EB:E4:46:D3:16:49:40:34:DC:88:66:76:81:28:68:8B:1D

Format required by BearSSL::WiFiClientSecure is

    const uint8_t fingerprint[20] =  { 0xBA, 0xED, 0xB9, 0xEB, 0xE4, 0x46, 0xD3, 0x16, 0x49, 0x40, 0x34, 0xDC, 0x88, 0x66, 0x76, 0x81, 0x28, 0x68, 0x8B, 0x1D };

• finish displayResponse
• Find font with polish characters
• Setup OTA, debugger
• load realtime from external NTP service to log it: https://www.geekstips.com/arduino-time-sync-ntp-server-esp8266-udp/, https://www.pool.ntp.org/zone/pl
• Create bollard monitor data structure for bollard info so parsing and displaying is decoupled, so display refresh can be faster (no waiting for parsing, serial printing...)
• Update all bollard monitors in background so switch is instant
• Make selected bollard persistent - store current bollard # in EEPROM
• Read bollards from config instead of hardcoding
• Encrypt passwords, SSIDs
• Store encrypted password, ssid in eeprom with SPIFFS or similar solution
• Create commandline interface to change ssids, passwords
• setup AP with web interface to change ssids, passwords
• Unit tests - requires paid PIO Plus - to bottom of backlog