HOPE XV Electronic Badge

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The HOPE XV Electronic Badge PCB (front)


The HOPE XV Electronic Badge PCB (back)



Firmware

<Must-still-be-uploaded>
hopebadge-0.8.14.bin

Badge Clinic

Come by the Badge Clinic, and one of our specialized nurse practitioners will help you with all of your HOPE XV Electronic Badge needs.
Come by for:

  • help with assembly
  • to find out more about features
  • to hack on the badge
  • to volunteer to help others

Description

The HOPE XV badge was given to in-person HOPE attendees. Circuit boards are purple (attendee badge) and black (pro version with more components populated). Cases are pink, green, and black (pro version).


Two 'pro' versions (with additional components) could be purchased at the Badge Clinic for $100 (extra components) and $150 (extra components and accessories).

Features

The HOPE XV Electronic Badge has lots of cool features!

  • Lots of colored blinky lights (16 WS2812 or similar)!
  • ESP32-C3 microcontroller
  • MCP73871 LiPo LiPo battery charge controller.
  • Feature 2
  • Feature 3
  • Feature etc

The Buttons

The firmware on the attendee Badge is setup for:

  • button 1 - cycle thru light patterns
  • button 2, 3 - dim/brighten LEDs
  • button 4 - push to send an IR blast to other badges in Range, making their lights flash and motor vibrate

Open Hardware

The HOPE XV Electronic Badge is totally Open Hardware!
Use the vibration branch to pickup the code that runs the small vibration motor.

  • The repository linked appears to be correct (REL_0.8.14), but does not specifically mention HOPE, so looking for confirmation.

It is also totally hackable.

BOM

This bill of materials is based on the KiCAD project. There are a number of components that are not populated on the badges distributed to attendees.

Reference Value Datasheet Footprint Qty DNP
AE1 Antenna_Loop ~ Mondev:NFCAntenna_65mm_north 1
AE2 Antenna_Conn ~ Mondev:Molex_5051100492-1x04-P0.5mm_Horizontal 1
AE4 Antenna ~ Connector_Coaxial:SMA_Samtec_SMA-J-P-X-ST-EM1_EdgeMount 1
BT1 Battery_Cell ~ Connector_Molex:Molex_PicoBlade_53261-0371_1x03-1MP_P1.25mm_Horizontal 1
C1,C2 18pF ~ Capacitor_SMD:C_0805_2012Metric 2
C3,C31 10uF ~ Capacitor_SMD:C_0805_2012Metric 2
C4,C6,C11,C12,C14,C15,C16,C17,C18,C19,C20,C21,C22,C23,C24,C25,C26,C27,C28,C29,C30,C35,C38,C45,C47,C50,C52,C53,C56,C58,C61,C66 0.1uF ~ Capacitor_SMD:C_0805_2012Metric 32
C5,C7 15pF ~ Capacitor_SMD:C_0805_2012Metric 2
C8,C9,C13,C32,C33,C46,C59,C62 1uF ~ Capacitor_SMD:C_0805_2012Metric 8
C10,C63,C64,C65 0.01uF ~ Capacitor_SMD:C_0805_2012Metric 4
C34,C36,C49 4.7uF ~ Capacitor_SMD:C_0805_2012Metric 3
C37,C48,C51 22uF -- mixed values -- Capacitor_SMD:C_0805_2012Metric 3
C39,C42 47pF ~ Capacitor_SMD:C_0805_2012Metric 2
C40 NC ~ Capacitor_SMD:C_0805_2012Metric 1
C41,C43 0,1uF ~ Capacitor_SMD:C_0805_2012Metric 2
C44,C57,C60 100pF ~ Capacitor_SMD:C_0805_2012Metric 3
C54,C55,L3 TBD ~ -- mixed values -- 3
D1,D2,D3,D4,D5,D6,D7,D8,D9,D10,D11,D12,D13,D14,D15,D16 WS2812B https://cdn-shop.adafruit.com/datasheets/WS2812B.pdf LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm 16
D17,D18,D20,D21,D22,D26,D27,D28 LED ~ -- mixed values -- 8
D19,D24,D25 D_Schottky -- mixed values -- Diode_SMD:D_SOD-123 3
D23 IR17-21C http://www.everlight.com/file/ProductFile/IR26-21C-L110-TR8.pdf LED_SMD:LED_1206_3216Metric 1
FB1,FB2,FB3 742792042 ~ Inductor_SMD:L_0805_2012Metric 3
FID1,FID2,FID3,FID4,FID5,FID6,FID7,FID8 Fiducial ~ Fiducial:Fiducial_1mm_Mask2mm 8
H1,H2,H3,H4 MountingHole ~ MountingHole:MountingHole_3.2mm_M3 4
IC1 IRM-H6xxT https://datasheet.lcsc.com/szlcsc/2010221806_Everlight-Elec-IRM-H638T-TR2-DX_C390031.pdf Mondev:IRM-H6XXT 1
J1 Conn_01x02 ~ Connector_Molex:Molex_PicoBlade_53261-0271_1x02-1MP_P1.25mm_Horizontal 1
J2 Conn_01x04 ~ Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal 1
J3,J4 Conn_02x03 ~ Mondev:Badgelife-SAO-169 2
J5 Conn_ARM_JTAG_SWD_10 http://infocenter.arm.com/help/topic/com.arm.doc.ddi0314h/DDI0314H_coresight_components_trm.pdf Connector:Tag-Connect_TC2050-IDC-NL_2x05_P1.27mm_Vertical 1
J6 USB_C_Receptacle_USB2.0 https://www.usb.org/sites/default/files/documents/usb_type-c.zip Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 1
J7 Conn_01x22 https://www.te.com/deu-de/product-2-1734839-2.html Connector_FFC-FPC:TE_2-1734839-2_1x22-1MP_P0.5mm_Horizontal 1
J8 Conn_01x39 ~ Connector_FFC-FPC:TE_3-1734839-9_1x39-1MP_P0.5mm_Horizontal 1
JP3 SolderJumper ~ Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm 1
L1 2nH ~ Inductor_SMD:L_0603_1608Metric 1
L2 22uH ~ Inductor_SMD:L_Taiyo-Yuden_MD-4040 1
MK1 SPH0641LU4H-1 https://www.knowles.com/docs/default-source/model-downloads/sph0641lu4h-1-revb.pdf Sensor_Audio:Knowles_LGA-5_3.5x2.65mm 1
N1 Housing ~ 1
Q1,Q3 DMP3056L-7 https://www.taiwansemi.com/products/datasheet/TSM2301A_C15.pdf Package_TO_SOT_SMD:SOT-23 2
Q2 BC847 http://www.infineon.com/dgdl/Infineon-BC847SERIES_BC848SERIES_BC849SERIES_BC850SERIES-DS-v01_01-en.pdf?fileId=db3a304314dca389011541d4630a1657 Package_TO_SOT_SMD:SOT-23 1
R1,R3,R5,R7,R13,R17,R18,R26,R27,R35 10K ~ Resistor_SMD:R_0805_2012Metric 10
R2,R21,R33 100 ~ Resistor_SMD:R_0805_2012Metric 3
R4,R12,R14,R15 4K7 ~ Resistor_SMD:R_0805_2012Metric 4
R6,R16,R36,R37 5K6 ~ Resistor_SMD:R_0805_2012Metric 4
R8 6K8 ~ Resistor_SMD:R_0805_2012Metric 1
R9 4.7 ~ Resistor_SMD:R_0805_2012Metric 1
R10,R11 3K9 ~ Resistor_SMD:R_0805_2012Metric 2
R19,R20 47 ~ Resistor_SMD:R_0805_2012Metric 2
R22 100K ~ Resistor_SMD:R_0805_2012Metric 1
R23 330 ~ Resistor_SMD:R_0805_2012Metric 1
R24,R25 5K1 ~ Resistor_SMD:R_0805_2012Metric 2
R28 2K2 ~ Resistor_SMD:R_0805_2012Metric 1
R29,R32,R34 0 ~ Resistor_SMD:R_0805_2012Metric 3
R30 39K2 Resistor_SMD:R_0805_2012Metric 1
R31 2K Resistor_SMD:R_0805_2012Metric 1
SF1 Soldfeld Mondev:SolderlittleArea_8 1
SW1 SPST-Grau ~ Button_Switch_SMD:SW_SPST_PTS645 1
SW2 SPST-Red ~ Button_Switch_SMD:SW_SPST_PTS645 1
SW3,SW4 SPST-Noire ~ Button_Switch_SMD:SW_SPST_PTS645 2
SW5 SPST-Bleu ~ Button_Switch_SMD:SW_SPST_PTS810 1
SW6 SW_SPDT ~ Mondev:SW_SPDT_CK-JS102011SCQN 1
TP1,TP3,TP4,TP5,TP9,TP10,TP11,TP12,TP13,TP14,TP16,TP17,TP18,TP19,TP20,TP21,TP22,TP23,TP24,TP25 TestPoint ~ -- mixed values -- 20
TP6,TP7,TP15 Test ~ -- mixed values -- 3
U1 ESP32-C3 https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm_ThermalVias 1
U2 AP2112K-3.3 https://www.diodes.com/assets/Datasheets/AP2112.pdf Package_TO_SOT_SMD:SOT-23-5 1
U3 MCP73871 http://www.mouser.com/ds/2/268/22090a-52174.pdf Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm 1
U4 MAX17048 https://datasheets.maximintegrated.com/en/ds/MAX17048-MAX17049.pdf Package_DFN_QFN:DFN-8-1EP_2x2mm_P0.5mm_EP0.7x1.3mm 1
U5 74LVC1G17 https://assets.nexperia.com/documents/data-sheet/74LVC1G17.pdf Package_TO_SOT_SMD:SOT-23-5 1
U6,U13,U14 ST25DV04K-JF https://www.st.com/resource/en/datasheet/st25dv04k.pdf Package_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.3x1.5mm 3
U7 Sensirion_SGP30 https://sensirion.com/resource/datasheet/sgp30 Mondev:Sensirion_SGP30 1
U8 93CxxC http://ww1.microchip.com/downloads/en/DeviceDoc/20001749K.pdf Package_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.3x1.5mm 1
U9 PCF8574 http://www.nxp.com/documents/data_sheet/PCF8574_PCF8574A.pdf Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm 1
U10 MT3608 Package_TO_SOT_SMD:SOT-23-6 1
U11 ATECC608B http://ww1.microchip.com/downloads/en/DeviceDoc/ATECC608A-CryptoAuthentication-Device-Summary-Data-Sheet-DS40001977B.pdf Package_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.3x1.5mm 1
U12 SKYA21024 https://www.skyworksinc.com/-/media/skyworks/documents/products/2701-2800/skya21024_204618c.pdf Mondev:QFN-6-1x1mm_P0.5mm 1
Y1 Crystal_GND24 ~ Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm 1
Y2 Crystal ~ Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm 1

User Manual

The User Manual has a lot of useful information -- you can see the PDF here:
HOPE XV Electronic Badge User Manual

UsersManualStandardPage1.jpg



Here is the User Manual for the Pro model of the HOPE XV electronic badge:
HOPE XV Pro Model User Manual

UsersManualPage1.jpg



MicroPython

MicroPython firmware can be flashed on the badge to explore its features with an interactive Python console. When finished, you can copy your code to /boot.py to have it run each time it's powered on.

Installation

Note: this will erase the HOPE firmware, so please obtain a copy if you'd like to flash it back.

Using the esptool.py flasher utility: 

esptool.py erase_flash
esptool.py write_flash 0x0 ~/Downloads/ESP32_GENERIC_C3-20240602-v1.23.0.bin

If no serial device is found, try holding down the SW2 button while switching on the badge to put it in "safe mode".

When finished, make note of the serial port auto-detected by esptool.py (ex. /dev/ttyACM0). You should now be able to get a Python console with: 

screen /dev/ttyACM0
>>> print('hello world')
hello world

If you only see a blank screen, try pressing Enter and/or turning the badge off and back on again.

Snippets

Please see the Quick reference for the ESP32 for helpful snippets.

WiFi

WiFi works (please see this guide), with one caveat: maybe my badge is faulty, but I had to reduce the transmit power level slightly to connect to an access point: 

import network

wlan = network.WLAN(network.STA_IF)
wlan.active(True)

wlan.config(txpower = 14) # HACK: see note above

wlan.connect('my-ssid', 'my-key')
wlan.isconnected() # wait until True
wlan.ifconfig()

LEDs

A NeoPixel library is available to work with the LED strip: 

import neopixel
from machine import Pin

pin = Pin(8, Pin.OUT)
neo = neopixel.NeoPixel(pin, 16)

# Draw a red gradient.
for i in range(16):
    neo[i] = (i * 8, 0, 0)

# Update the strip.
neo.write()

Buttons

2/4 buttons work, perhaps because of this? Please update this if you discover a solution! 

from machine import Pin

sw1_pin = Pin(10, Pin.IN, Pin.PULL_UP)
sw2_pin = Pin(9, Pin.IN, Pin.PULL_UP)

sw1_pin.value()
1
sw1_pin.value() # pressing SW1
0
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