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bbqkees / Nefit-Buderus-EMS-bus-Arduino-Domoticz

Readout of EMS protocol datagrams and transfer of data to Domoticz via Arduino
MIT License
88 stars 25 forks source link

Not an issue, just a question.... #1

Closed proemke closed 7 years ago

proemke commented 7 years ago

Hi bbqkees,

Do you know how much current can be pulled from the EMS front service jack connector? I'm planning to make a pcb with an ESP8266 module to push the data to a MQTT broker. I want to convert the 12V to 3.3V, if enough current is available then an external power source won't be needed.

Best regards, Edjeed

Ps. Sorry for abusing the issue page, didn't know where to ask else... I am not able to measure myself, don't have a Nefit yet (but will be having one soon)

bbqkees commented 7 years ago

Nefit sells a Wifi service module that connects only to that plug. So maybe there is enough current available for an ESP. You would have to try though. The ESP may draw i believe about 300mA on 3v.

On 21 Jan 2017 10:49, "edjeed" notifications@github.com wrote:

Hi bbqkees,

Do you know how much current can be pulled from the EMS front service jack connector? I'm planning to make a pcb with an ESP8266 module to push the data to a MQTT broker. I want to convert the 12V to 3.3V, if enough current is available then an external power source won't be needed.

Best regards, Edjeed

Ps. Sorry for abusing the issue page, didn't know where to ask else... I am not able to measure myself, don't have a Nefit yet (but will be having one soon)

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