**[[de::start|OB121 deutsch]]**  \\
[[de::s7::start|Simatic S7]] \\
[[de::arduino::start|Arduino]] \\
[[de::project::arduino|Arduino Projekts]] \\
[[de::main::hw_index|OB121 Hardware-Index]] \\
[[de::impressum|Impressum]] \\
**[[hu::start|OB121 ungarisch]]**  \\
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**ESP8266 / ESP32** \\
- [[de::esp::start|ESP8266 Hardware]] \\
- [[de::esp::at_commands|ESP8266 AT Befehle]] \\
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**[[de::esp::nodemcu|nodeMCU]]**
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- [[de::esp::nodemcu_com|nodeMCU Kommunikation]]\\
- [[de::esp::nodemcu_serial|nodeMCU serial]] \\
- [[de::esp::nodemcu_i2c|nodeMCU I²C]] \\
- [[de::esp::nodemcu_http|nodeMCU HTTP]] \\
- [[de::esp::nodemcu_mqtt|nodeMCU MQTT]] \\
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**ESP8266 Hardware Lösungen** \\
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- [[de::arduino::dc_dc|DC/DC Konvertern]] \\