Connect the serial interface of the Sonoff Basic with the serial interface of the PZEM-004T. See pictures regarding used colors and connections. If I do go that route what impact will this have on measuring a 3 phase system? In other word using 3x PZEM-004 devices with the smaller CT’s to measure the 500 A feed. You need to compile your own Tasmota firmware as none of the pre-compiled binaries have support for display and PZEM module.

PZEM-004T - Hardware Using a Larger CT with a PZEM-004T - Hardware

I removed the modbus entries for the 2nd PZEM (so that HA only polls the first one) but the errors continued. This Peacefair PZEM-004T Multi-function AC Power Monitor is very popular in electrical consumption measurement projects. It is capable of measuring four interrelated electrical variables as voltage, current, power, and energy. These devices have optocouplers on the UART port and the resistors mounted on the board have been designed to work with 5V devices. For connection or connection between PZEM-004T V3.0 with Current Transformer (CT), Load and Arduino in full can be seen in the picture below : Wiring PZEM-004T with Load PZEM-004T V3.0 Module Function Testingich hab ein MeanWell Netzgerät und anfangs auch alles über das Netzgerät versorgt. Allerdings hat das ja komischerweise nicht funktioniert. Deshalb bin ich auf die Idee mit dem USB Anschluss gekommen. After setting-up the Cayenne Dashboard, we must test the PZEM-004T V3 meter before interfacing with the dashboard. as far as i can remember (sorry but my pzem04 is left alone with a remote bluetooth serial dongle inside the electrical panel and i have no access to it..) i could not get it to work with the serial port of the raspberry, i had to use a dedicated USB to serial adapter, so yes: it should work. Energy Auditing: Power monitoring systems are valuable tools for energy auditors to assess energy usage patterns in residential and commercial buildings. The collected data helps auditors identify areas for energy conservation and recommend improvements. The only thing i hate of this little and cheap thing is that you can't have a simultaneous reading of data.

GitHub - olehs/PZEM004T: Arduino communication library for

In this project, we are using Bharat Pi which has both ESP32 microcontroller and a SimCom A7672S 4G/LTE module. Pzem-004T an die gleiche Phase (L1- L3) wie der zu Messenden Stromkreis anschließen, da es sonst zu Messfehlern kommt! I have been using the Peacefair Pzem-004T for the last year or so and have found them to be very reliable. Install Tasmota on the Sonoff Basic and confirm it is functional before connecting the PZEM-004T to its serial interface. Hardware connections ~ Your original problem is you have (or intend to have?) a c.t. with a 1 A secondary, whereas the instrument expects 100 mA to indicate 100 A (I presume). Your need is to get that 100 mA for 500 A load current. As @Bill.Thomson suggested, a 500 A : 100 mA c.t. would do it in one step, your alternative is to do it in two steps and use your 100 A c.t. as an interposing c.t., in which case your better solution would be a 500:5 primary c.t.; and then use 10 turns in the secondary winding of that to give you 50 At to indicate 50 A on the instrument using its original 100 A c.t. (And multiply the reading by 10.)The clamp is connected to a wire that’s feeding my NAS/Pi etc, so I know that there should be data available. What I’d do is measure the input current: feed a low measured current into the PZEM and see what it reads - starting very low - say 10 mA and gradually increase the current until it reads about half-scale. Then you can infer the full-scale input current and the calibration. Always follow safety precautions when working with electrical circuits and power sources. Ensure that you are well aware of the voltage and current levels you are dealing with, and take necessary precautions to avoid electrical hazards. Why bother with a burden? The c.t. will be very happy driving into an almost dead short - it’s delivering almost zero power. It could be a 100-turns coil - or as many turns as will fit and give a nice round number to multiply the reading by - say 50 turns ideally. 500 A primary current in the ‘big’ c.t will give 1 A secondary current, and 50 At from the primary winding of the ‘small’ c.t, and the instrument reads 50 A instead of 500. After adding the ESP8266 board, it must be interfaced with the Cayenne Dashboard. Cayenne Dashboard ESP8266 Setup + Connection:

pzem-004t · GitHub Topics · GitHub pzem-004t · GitHub Topics · GitHub

putX: These methods store values of various data types (e.g., putInt, putFloat, putString) in the preferences identified by a key (name). For example, putInt("someKey", 42) stores the integer value 42 with the key "someKey". Die Dioden habe ich im Tx Strang verbaut. Nur die zusätzliche Versorgung hab ich nicht drin. Es funktioniert auch ohne. Ist die einfach nur zur Unterstützung des Bus da? I have negative peaks in Watt’s … not sure why the sensor would give such big negative values (around -2500W a dozen of times a day (not night when all is quite). I think it happens when there is a higher load. I re-read this entire thread and noted several comments about swapping RX/TX so I did it physically.NAME":"HW-655 PZEM","GPIO":[0,62,0,63,0,0,0,0,0,0,0,0,0],"FLAG":0,"BASE":18} PZEM-004T version V3 ~ I think it is highly likely that the 1 A secondary current (at the rated primary current) will be far too great for the device. Can you measure the secondary current of the supplied c.t? This module features a TTL serial data communication interface, you can read and set the relevant parameters via the serial port; but if you want to communicate with a device which has USB or RS232 (such as a computer), you need to be equipped with different TTL pinboard (USB communication needs to be equipped with TTL to USB pinboard; RS232 communication needs to be equipped with TTL to RS232 pinboard).