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xoseperez / hlw8012

HLW8012 library for Arduino and ESP8266 using the Arduino Core for ESP8266.
GNU General Public License v3.0
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HLW8012 CP1 frequency capping #13

Closed TrCaner closed 5 years ago

TrCaner commented 5 years ago

I'm currently designing a circuit that contains the HLW8012. But I'm having a problem with the CF1 pin capping at 1.7kHz output, while in current mode. The circuit I use is the one provided in the datasheet of the HLW8012, with the MCU connected directly to the HLW8012 pin. I have tried replacing components in case it was a bad component, but no luck so far. Since non of this worked I tried to start with a low current and increasing it to see where it caps.

My results were as follows: 0.323A -> 348Hz 0.523A -> 561Hz 0.716A -> 753Hz 1.256A -> 1332Hz 1.563A -> 1602Hz 1.673A -> 1724Hz Everything above the 1.6A gets a frequency of around 1700Hz (1.7kHz). (For the load, I used multiple lamps that consume between 50-120W)

Any idea's what could cause this problem?

uzi18 commented 5 years ago

@TrCaner did you used multimeter/frequency meter? please paste your test code

TrCaner commented 5 years ago

I used 3 methods to measure the frequency. The first was a multimeter, second a oscilloscope and last a simple frequency measurement code that makes uses of PCNT, timers, interrupts etc. All 3 gave the same reading of the frequencies.

To be sure I ordered a new batch of chips from a different supplier and this solved my problem. I could now accurately measure the current (tested till a max of 8A). This meant that I had ordered a fake set of chips the first time that couldn't measure more than what i stated before.

Since the problem is solved I'll be closing this issue.