Ready to build your WeighMyBru smart coffee scale? This comprehensive assembly guide will walk you through every step of the process, from unpacking your components to your first brew.

Assembly Video Tutorial

Follow along with our detailed assembly video guide:

Bill Of Materials

NOTE
Ensure the correct items are selected when purchasing. Some of the links have multiple options. It is always a good idea to purchase extra boards for items like HX711 or Capacitive Touch Pads, as sometimes depinning these can destroy the boards traces.

Qty	Item	Aliexpress Link	Amazon Link
1	500g Mini Loadcell (I-shaped)	https://s.click.aliexpress.com/e/_c4C1w6PZ	https://a.co/d/6kvxZ0H
1	HX711	https://s.click.aliexpress.com/e/_c3TSpcUT	https://a.co/d/3KiYRkA
1	ESP32-S3-Supermini Board	https://s.click.aliexpress.com/e/_c3ay7dDv	https://a.co/d/6289vbS
2	Capacitive Tocuh Pads	https://s.click.aliexpress.com/e/_c3WIlVuX	https://a.co/d/014di6l
1	0.91” SSD1306 OLED Display	https://s.click.aliexpress.com/e/_c3kybwLD	https://a.co/d/9UClWku
1	JST-PH 2.0 Male Connector	https://s.click.aliexpress.com/e/_c3F8rJlv	https://a.co/d/3BZGuHW
1	Slide Switch (5mm handle)	https://s.click.aliexpress.com/e/_c4nZfmFD	https://a.co/d/9KRqMyF
1	Hookup Wire (Various Colors)		https://a.co/d/1Fs8os9
2	M3x5x4 Heat Set Inserts		https://a.co/d/bnQD7Iu
16	M1.7x4 Self Tapping Screws		https://a.co/d/1np5Nes
4	M3x12 Button Head Screws		https://a.co/d/iqM3d6E
2	100K ohm 1% 1/4w resistors		https://a.co/d/3R0YmGM
4	Self-Adhesive Rubber Feet		https://a.co/d/0q9TRmR
1	Double Sided Tape (To hold Battery)		https://a.co/d/gM5SWwH
1	800mAh Li-ion Battery		https://a.co/d/gbr1Yft

Wiring Diagram

Assembly Steps Overview

1. PCB Preparation

• Install ESP32 headers
• Mount load cell amplifier
• Check all connections

2. Load Cell Mounting

• Secure load cell to base plate
• Connect load cell wires to PCB
• Test weight measurements

3. Enclosure Assembly

• Install PCB in bottom case
• Route cables properly
• Secure top and bottom halves

4. Calibration

• Power on the scale
• Connect to WeighMyBru app
• Run calibration sequence

Troubleshooting

Scale not powering on?

• Check battery connections
• Verify power switch position
• Test with USB power

Weight readings incorrect?

• Recalibrate with known weights
• Check load cell connections
• Verify mounting is secure

Bluetooth not connecting?

• Reset ESP32
• Check app permissions
• Verify pairing mode

Next Steps

Once assembled:

1. 📱 Download compatible brewing apps (Bean Conqueror, GaggiMate)
2. ⚖️ Calibrate with precision weights
3. ☕ Start brewing amazing coffee!

Need Help?

Join our community Discord for assembly help and brewing tips: WeighMyBru Discord

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Happy brewing! ☕