Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib
jithinsisaac·LoRa-PV-RMS-SolarSurveil·PCB_ESP32_ATM90E26_Board/AC_RMS_ESP32_ATM90E26.kicad_pcb
About the Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib PCB
Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib is an open source ESP32 PCB design by jithinsisaac, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 67.8 × 67.8 mm, with 55 components from 29 distinct parts.
Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the ATM90E26-YU-B and AMS1117-3.3. By type, the board carries 17 capacitors, 17 resistors, 14 connectors, 3 ICs, 2 switches and 1 crystal.
It belongs with the rf & radio, power & battery and iot & wireless designs in this gallery.
From the project
IEEE SIGHT MTT-S funded project on Remote Energy Monitoring of Solar PV installations using LoRaWAN (Solar Surveil)
Student Team Members 1. Shreyas Kulkarni 2. Keith Barnes 3. Shreyas Kulkarni 4. Aparna Kulkarni
Faculty Team Members 1. Dr. Ashwini Kotrashetti 2. Tayyabali Sayyad 3. Gejo George 4. Freda Carvalho 5. Jithin Saji Isaac (Project Guide)
- All the source code required for PCB design, firmware development & web application development has been open sourced. Make maximum use of the same!

Main components on the Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib
Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib bill of materials (BOM)
55 components, 29 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-WROOM-32 | ESP32-WROOM-32 | U1 |
| 1 | ATM90E26-YU-B | SSOP-28 | U2 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U3 |
| 1 | 8.192 MHz | Crystal_SMD_HC49-SD_HandSoldering | Y1 |
| 1 | CONN_01X02_MALE AudioJack4 | Jack_3.5mm_PJ320D_Horizontal | J1 |
| 8 | CONN_01X02_MALE Conn_01x02_Male | PinHeader_1x02_P2.54mm_Vertical | J2, J3, J5, J6, J11, J12, J13, J14 |
| 1 | CONN_01X02_MALE USB_B_Micro | MicroUSB-LCSC-C21377-Sunrom-4358 | J4 |
| 1 | AUDIOJACK4 Conn_01x02_Male | PinHeader_1x02_P2.54mm_Vertical | J7 |
| 1 | Barrel_Jack_Switch | BarrelJack_CLIFF_FC681465S_SMT_Horizontal | J8 |
| 1 | CONNECTOR_CONN_01X06_FEMALE Connector_Conn_01x06_Female | PinHeader_1x06_P2.54mm_Vertical | J9 |
| 1 | Conn_01x02_Male | PinHeader_1x02_P2.54mm_Vertical | J10 |
| 2 | SW_Push | Tactile Switch 3x4x2mm | sw1, sw2 |
| 1 | LED'1206' | LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D2 |
| 2 | 10UF 10uF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C1, C2 |
| 2 | 0.1UF 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C3, C6 |
| 1 | 22UF 22uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C4 |
| 3 | 10UF 10uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C5, C7, C17 |
| 2 | 330NF 330nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C8, C18 |
| 2 | 33NF 33nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C9, C10 |
| 2 | 27PF 27pF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C11, C12 |
Show 9 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 0.1UF 0.1uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C13, C15, C16 |
| 1 | 18 | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1 |
| 4 | 470K | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2, R3, R6, R7 |
| 2 | 100K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R4, R16 |
| 2 | 10K | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R5, R8 |
| 3 | 1K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R9, R10, R17 |
| 2 | 1.8K | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R11, R12 |
| 1 | 12R | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R13 |
| 2 | 100R | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R14, R15 |
Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib design files
The KiCad project lives in the jithinsisaac/LoRa-PV-RMS-SolarSurveil repository on GitHub; these links point at the commit this page was built from.
Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib: common questions
What microcontroller does the Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib use?
The Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib is built around the ESP32-WROOM-32, from the ESP32 family.
How big is the Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib PCB?
The Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib measures 67.8 × 67.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib?
55 components, from 29 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib design files?
From the jithinsisaac/LoRa-PV-RMS-SolarSurveil repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib design in my own project?
Yes, under the terms of its GPL-3.0 license, which jithinsisaac chose for the repository.
Can I test firmware for the Single Phase AC Energy Monitoring ESP32+ATM90+EmonLib without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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