Question

[Groofertje]

When i study the foto (meter2.png) i see a condensator connected to the (i think) green cable just under the ESP. Witch value has it, and how it is connected?. Can you eventual say what the reason is.

Srr for my very bad english.

[torntrousers]

I'll crack one open tomorrow and let you know

[torntrousers]

There are two bypass capacitors I put across the power supply of the ESP12. The one you mention is a 100uF 6.3v tantalum capacitor connected to the ESP12 GND and 3.3V pins. There is also a 100nf ceramic capacitor in parallel with that. You can see that as the darker red circle at the botom left of the tantalum capacitor. These capacitors may not be needed. I'd been doing a lot with ESP's using deep sleep and having a power supply with decent bypass capacitors can help make deep sleep wake up more reliable. You could probably leave them out as the 3.3v power supply module is really close to the ESP and already has its own bypass capacitors, or if you've some other value capacitors using them could be fine too. Or use an ESP12S which has more bypass capacitors inside the can so there is less need to add extra ones.

[Groofertje]

Tx for the quick answer and help

Guy

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Van: Anthony Elder notifications@github.com Verzonden: Friday, November 1, 2019 3:42:58 PM Aan: HarringayMakerSpace/WiFiPowerMeter WiFiPowerMeter@noreply.github.com CC: Guillaume Swennen guy_swennen@hotmail.com; Author author@noreply.github.com Onderwerp: Re: [HarringayMakerSpace/WiFiPowerMeter] Question (#2)

There are two bypass capacitors I put across the power supply of the ESP12. The one you mention is a 100uF 6.3v tantalum capacitor connected to the ESP12 GND and 3.3V pins. There is also a 100nf ceramic capacitor in parallel with that. You can see that as the darker red circle at the botom left of the tantalum capacitor. These capacitors may not be needed. I'd been doing a lot with ESP's using deep sleep and having a power supply with decent bypass capacitors can help make deep sleep wake up more reliable. You could probably leave them out as the 3.3v power suplly module is really close to the ESP and already has its own bypass capacitors, or if you've some other value capacitors using them could be fine too.

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