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ESP8266 Gateway start without WiFi connection

LeoDJ last edited by

Maybe this question was already asked, but I could not find it.

I currently have an ESP8266 MQTT Gateway running smoothly. My only concern is what will happen, when the WiFi and/or MQTT gets disconnected. I have yet to try what happens, when disconnected during operation. But when the Gateway is in startup it absolutely requires WiFi and MQTT to be up and running, otherwise it will just sit there and try to connect forever.

Is there any way I can tell the Gateway to not wait for a WiFi + MQTT connection, if the connection attempt failed too many times? So that the Gateway can do its job of routing control signals in the sensor network even without convenience connections.

If this functionality is not implemented right now, I would like to add it. If the connection breaks during operation or if no connection was present at startup, the library could test periodically, if the connection can be established. Just like it is handled when using MY_TRANSPORT_SANITY_CHECK right now. And still route packages from and to the nodes.

Thanks for your help,
Leo
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@nca78 about my gateways: an old gateway running on MySensors 1.5 for years now. There are several nodes and sensors connected through it like temperature sensors, relays, switches. It controls my heating system with heat pump, buffering, 18 circles of floor heating, garden irrigation, alarm system, and some lights just for fun. the new gateway is a gateway to a Bluetooth network. Since MySensors has a great serial API and I have some experience with it I preferred to use it without a radio. I also think that it will be an interesting way of development and it could help to make MySensors even more popular. I had an idea to fork the library but unfortunately I don't have the experience and time to make it in good quality. But I'm sure letting developers to build connectors to different protocols is a very good idea. Catching Bluetooth messages from the air and decode them (with some reverse engineering) to send it through the MySensors gateway is relatively simple compared to the bidirectional communications. Processing some simple sensor data is a good first step.
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Thanks for your fast reply. That sounds easy. And you think that the communication between sensor nodes and Gateway are still possible via wired RS485? I tried to find an example on this site for sending Information from Gateway to sensor nodes. (via SendMessage ?) For example I like to Switch on/off an light that is connected to an relay board at my sensor node. Communcation Flow: OpenHab2 --> MQTT --> Gateway --> RS485 --> Sensor Node --> Relay Board Currently I have an working RS485 Connection between my Arduino Uno's with the use from SoftwareSerial library. During my testings I realized, that the message that I triy to send "Hello" will be sent to the other arduino char by char. Is that true? Because I tried to raise up an pin on HIGH with "if(msg == "Hello")..." But it doesn't worked. Will the sendMsg method from the MySensor library handle this out of the box? Regards, Simon
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@OldSurferDude I posted this question in the Home Assistant forum, too. I figured it out! See my post in HA OSD
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Hi @neelam, welcome to the forum! The dimmer example should work. If you want to use only the esp8266 with wifi (no nrf/rfm or other radio), you'll also need to add gateway settings from https://www.mysensors.org/build/esp8266_gateway
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@NeverDie Thx for appreciating the work done. There will also be an open source part in the future. When and how extensive the open source part will be, remains to be seen. The release of certain information (block diagram, ..., in this post) is related to those open source parts. There are some OBD solutions, however most of them (in my experience) give back low frequency data put by the car manufacturer on the OBD-bus (CAN, ...). Therefore transients evolving directly from the battery could only be recorded if the manufacturer sends those data accordingly on the bus. Due to the small bandwidth(also because of other car data that have to be sent, ...), such battery data are sent more often once per second or less. Fast battery events (i.e. cranking events, ...) are therefore imperceptible. Unless the manufacturer processes the fast events and then sends them (once per second or less), which is very unlikely if the manufacturer does not market this feature itself. Third parties devices for high frequency sensing costs several hundreds dollars. In my experience, important battery states (especially the fast ones) are recorded by measuring and processing corresponding data directly on the battery. I agree with you about the limits related to the communication over Bluetooth. But i think Bluetooth 5.0 will improve a lot. However, WiFi will always remain an important option due to the high data throughput. The combination of both (BLE & WiFi), especially with regard to energy consumption, will gain in importance.
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@Yveaux I have 34 of 80k RAM used for this sketch, so 128 bytes looks like "a bit more". You can not use progmem with ESP and mysensors now because PSTR redefined as PSTR(x) (x) so all strings are really in RAM

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