文件列表:

.travis.yml (1557, 2021-03-05)
Data/ (0, 2021-03-05)
Data/Energy Meter Current.pdf (213711, 2021-03-05)
Data/Energy monitor Current.xls (87040, 2021-03-05)
Data/buffer stability.pdf (927732, 2021-03-05)
Data/buffer stability.pptx (149603, 2021-03-05)
Data/energy meter.cir (67434, 2021-03-05)
Data/recalibration due to resistor change.xlsx (9429, 2021-03-05)
Images/ (0, 2021-03-05)
Images/Energy_monitor_1 (Small).jpg (140377, 2021-03-05)
Images/Energy_monitor_2 (Small).jpg (88540, 2021-03-05)
PCB/ (0, 2021-03-05)
PCB/ESP32 Wroom door sensor 2-cache.lib (5458, 2021-03-05)
PCB/ESP32 Wroom door sensor-cache.lib (5336, 2021-03-05)
PCB/ESP32 Wroom energy meter-cache.lib (7124, 2021-03-05)
PCB/ESP32 Wroom energy meter.bin (92670, 2021-03-05)
PCB/ESP32 Wroom energy meter.dsn (25913, 2021-03-05)
PCB/ESP32 Wroom energy meter.kicad_pcb (100865, 2021-03-05)
PCB/ESP32 Wroom energy meter.kicad_pcb-bak (100865, 2021-03-05)
PCB/ESP32 Wroom energy meter.pro (871, 2021-03-05)
PCB/ESP32 Wroom energy meter.rules (2285, 2021-03-05)
PCB/ESP32 Wroom energy meter.sch (18458, 2021-03-05)
PCB/ESP32 Wroom energy meter.ses (18694, 2021-03-05)
PCB/ESP32-WROOM-32-Espressif-Symbol-Kicad-62379.kicad_mod (4021, 2021-03-05)
PCB/ESP32-WROOM-32.lib (2965, 2021-03-05)
PCB/ESP32_Wroom_door_sensor-eagle-import.dcm (48, 2021-03-05)
PCB/ESP32_Wroom_door_sensor-eagle-import.lib (652, 2021-03-05)
PCB/Energy Monitor PCB.pdf (29359, 2021-03-05)
PCB/Energy Monitor Schematic.pdf (72806, 2021-03-05)
PCB/MODULE_ESP32-WROOM-32.kicad_mod (7524, 2021-03-05)
PCB/MountingHole.pretty/ (0, 2021-03-05)
PCB/MountingHole.pretty/MountingHole_2mm.kicad_mod (691, 2021-03-05)
PCB/MountingHole.pretty/MountingHole_2mm_Pad.kicad_mod (677, 2021-03-05)
PCB/TEMP-HUM-PRES-BME280.lib (828, 2021-03-05)
PCB/TEMP-HUM-PRES-BME280.mod (2371, 2021-03-05)
PCB/esp-wroom-32.lib (1750, 2021-03-05)
PCB/esp32-wroom-32.dcm (48, 2021-03-05)
PCB/fp-info-cache (2651157, 2021-03-05)
PCB/fp-lib-table (228, 2021-03-05)
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# ESP32-Energy-Monitor Hardware and code are designed to use the Aeon labs Home Energy Meter, model DSB09104-zwus, current clamps and housing. I was frustrated with the occasional intermittent connection of the Aeon Labs Home Energy meter because the Z-Wave hub and energy meter were two floors apart. Also the energy meter would occasionally give very high erroneous readings. The unit did not work at all after I upgraded the firmware. That is what led to the ESP32 energy monitor project. **Features:** * Uses Aeon labs DSB09104-zwus current clamps and housing * Wifi has increased signal strength over Z-Wave * Uses a minimum amount of components * Calculates real power like residential energy meters * The capability of calculating power factor could be added * Can easily adjust the scale factors to get agreement with energy company's meter * Can debug using WiFi and telnet * Can download new code Over The Air (OTA) **Disadvantages:** * The power supply is old school with a 60Hz transformer with a diode bridge and 1000uF capacitor to provide the DC power and the 60 Hz AC signal to the energy meter. I picked up the 6 volt DC, 800mA class 2 power supply at the local surplus store. I opened the power supply to add the two wires for the sine wave input to the energy monitor. I also added two 1 amp rectifier diodes in series with the filtered DC output to the reduce the power of the AMS1117-3.3 LDO regulator on the energy monitor board. * There is some distortion of the sine wave voltage due to the load on the power supply. * The output of the current clamps is also distorted especially at low currents. The linearity of the output versus power is not too bad even with the distortion. * The WiFi activity adds some noise to the A/D coversions. * The energy totals get reset if there is a wifi problem or power interruption. Additonal code could be written to keep a running sum in Flash every so often. **PCB** The KiCad PCB files can be found in the PCB folder including a PDF file of the schematic and layout. There are two modifications that I made to the hardware design that are not shown in the documentation of the PCB folder. Modifications * I added a 22uF capacitor directly across the output and ground pins of the AMS1117-3.3 LDO regulator to stop the output oscillation. The other 22uF capacitor on the 3.3 volt output of the LDO regulator is close to the ESP32. * I addded a 200pF capacitor and a 100 ohm resistor to the op amp circuit that provides the 3.3/2 volt virtual ground to provide stability when driving a capacitive load. The output would oscillate when a 1x probe (120pF capacitance) was touched to the output. The Micro-Cap 12 stability analysis showed that the circuit should be stable with a 120pF capacitor. See 'Stability Analysis' in the data folder. Maybe there is other capacitances I am not accounting for or maybe the LMC6484 op amp I purchased on ebay is deficient in the stability performance area. The Micro-Cap file is also in the data folder. By the way, the Micro-cap 12 simulator is now free. **Other Information** * Pictures of the finished device can be found in the images folder. * A plot of the current consumption of the device can be found in the data folder. * I attached a logic analyzer to pin IO4 and let it run for an hour and did not see any missed 1 KHz samples

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