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15 lines
920 B
15 lines
920 B
8 years ago
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Esp-link: Outbound HTTP REST requests and MQTT client
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The V2 versions of esp-link use the SLIP protocol over the serial link to support simple outbound
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HTTP REST requests as well as an MQTT client. The SLIP protocol consists of commands with
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binary arguments sent from the
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attached microcontroller to the esp8266, which then performs the command and responds back.
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The responses back use a callback address in the attached microcontroller code, i.e., the
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command sent by the uC contains a callback address and the response from the esp8266 starts
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with that callback address. This enables asynchronous communication where esp-link can notify the
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uC when requests complete or when other actions happen, such as wifi connectivity status changes.
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You can find REST and MQTT libraries as well as demo sketches in the
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[el-client](https://github.com/jeelabs/el-client) repository.
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