Payment Terminal with TFT screen: verschil tussen versies

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(75 tussenliggende versies door 2 gebruikers niet weergegeven)
Regel 1: Regel 1:
 +
[[Category:Historic projects]][[Category:Nodes & network devices]][[Category:PaymentSystem]]
 +
 +
[[Bestand:Betaalterminal-prototype-dis.jpg|300px|Huidige versie voorruimte]]
 +
[[Bestand:Betaalterminal-prototype-dis-2.jpg|300px|Huidige versie, voor onderdelen betalen]]
 +
 +
Prototype voor bier/koffie afrekenen in de voor-ruimte. En achter bij de WC, voor afrekenen moeren, boutjes, etc uit de grijpvoorraad.  Zie [[SpaceTegoed]] voor een overzicht/plan, [[Payment and Paring REST protocol]] for the protocol and [[https://github.com/dirkx/makerspaceleiden-payment-node github for code]]. Screen documentation is at https://www.displayfuture.com/Display/datasheet/controller/ST7735.pdf.  Part of the [[SpaceTegoed|Space tegoed payment system]].
 +
 +
Er is een `extra' unit om mee te ontwikkelen en te debuggen.
 +
 +
= Versions build =
 +
 +
There are currently two in use
 +
 +
* In de schone ruimte; board revision 4, Firmware 1.05, <code>80:7D:3A:D5:46:8C</code>
 +
* Achter, bij de grijpvoorraad. board revision 3, Firmware 1.05 <code>C8:C9:A3:CB:B6:7C</code>, <code>192.168.6.200</code>
 +
* Ontwikkel/test unit; board revision 4, Firmware 1.XX <code>0:5A:1B:67:21:AB</code> -- niet aangesloten normaal gesproken.
 +
 
===Terminal met beeldscherm===
 
===Terminal met beeldscherm===
  
Regel 4: Regel 21:
 
[[Bestand:Betaalterminal-prototype-disp-3.jpg|150px|Possibly screen]]
 
[[Bestand:Betaalterminal-prototype-disp-3.jpg|150px|Possibly screen]]
 
[[Bestand:Betaalterminal-prototype-disp-4.svg|150px|Possibly screen]]
 
[[Bestand:Betaalterminal-prototype-disp-4.svg|150px|Possibly screen]]
 +
[[Bestand:Betaalterminal-prototype-pcb.pdf|150px|Possibly PCB]]
 +
[[Bestand:Betaalterminal-prototype-pcb-b.pdf|150px|Possibly PCB]]
  
 
Video: https://player.vimeo.com/video/628163050?h=e344411a85
 
Video: https://player.vimeo.com/video/628163050?h=e344411a85
Regel 19: Regel 38:
 
Na een minuut geen gebruik gaat de terminal ook altijd terug naar stap 1.
 
Na een minuut geen gebruik gaat de terminal ook altijd terug naar stap 1.
  
−
==== Lasercut prototype ====
+
= Troubleshooting =
 +
 
 +
First thing to check are the pairing in [https://mijn.makerspaceleiden.nl mijn.makerspaceleiden.nl] and then check the logs on the server <code>/var/logs/crm/crm.debug</code> and the MQTT logs in <code>/var/log/mqtt</code>
 +
 
 +
These will tell you recent reported states and the most recently known IP addresses claimed.
 +
 
 +
It is possible to 'telnet' into these units (on the normal telnet port #23) and see what normally would come out of the serial port. The units also sent their logging to syslog (to the spaceserver,  192.168.6.1).
 +
 
 +
Check [[MQTT]], the firewall, use a [[https://en.wikipedia.org/wiki/Multicast_DNS MDNS]] [[https://www.win.tue.nl/~johanl/educ/IoT-Course/mDNS-SD%20Tutorial.pdf resolver]] (or simply the Arduino IDE) to discover their IP address. You can do this from the RaspPi next to the [[Vinyl Cutter / Vinylsnijder / Snijplotter]].
 +
 
 +
{| class="wikitable"
 +
|-
 +
! MAC !! Versie !! Mac address !! IP address
 +
|-
 +
| Grijpvoorraad || 1.04 || C8:C9:A3:CB:B6:7C ||  192.168.6.200
 +
|-
 +
| Voorruimte || 1.04 || 80:7D:3A:D5:46:8C || 192.168.6.189
 +
|}
 +
 
 +
Version deployed as of November 2021: https://github.com/dirkx/makerspaceleiden-payment-node/releases/tag/v1.04
 +
 
 +
A typical session looks like:
 +
<pre>
 +
$ telnet 10.13.0.241 23
 +
unset@tft-1.04-c767b4 Telnet connected C8:C9:A3:C7:67:B4
 +
10.13.0.1:58451 Connected.
 +
fetching prices
 +
HTTP reponse: 200
 +
Payload: {"name": "tft-1.04-c767b4", "description": "Laswerkplaats", "pricelist": [{"name": "mig-gas", "description": "Mis gas, beetje", "price": "1.00", "default": true}, {"name": "C3H8", "description": "Veel gas (mig, tig of propaan)", "price": "5.00"}, {"name": "meer mig-gas", "description": "Mig gas; meer", "price": "2.50"}]}
 +
parsed as json fine
 +
    mig-gas * 1.00
 +
        C3H8  5.00
 +
meer mig-gas  2.50
 +
Pricelist fetched; 3 items
 +
got prices
 +
Bad read (was card removed too quickly ? )
 +
</pre>
 +
 
 +
 
 +
Furthermore - if you connect to <code>space.makerspaceleiden.nl</code> via [[MQTT]] - then you can also see the output:
 +
 
 +
<pre>
 +
TOPIC: ac/log/tft-1.04-cbb67c
 +
  Grijpvoorraad {
 +
  "rfid_scans": 0,
 +
  "rfid_misses": 0,
 +
  "ota": true,
 +
  "state": 3,
 +
  "IP_address": "192.168.6.200",
 +
  "Mac_address": "C8:C9:A3:CB:B6:7C",
 +
  "Paid": 0,
 +
  "Version": "1.04",
 +
  "Firmware": "tft-1.04-cbb67c",
 +
  "heap": 139667
 +
}
 +
</pre>
 +
 
 +
Any error message (post joining the Wifi network) will show up here. If the issue is prior to joining WiFi - you will have to connect a USB cable (Baudrate 115200, 8N1). The Raspi has the right drivers installed.
 +
 
 +
Finally - all logging is also sent to <code>syslog</code> on the local server in the space; at <code>Facility local0 (16), Severity debug (7)</code>.
 +
 
 +
= Building one =
 +
 
 +
[[Bestand:Oled-esp-ttf.jpg|miniatuur|Prototype version 2]]
 +
 
 +
If you need to build one - contact Dirk-Willem van Gulik - as we have a few `one board' versions that perhaps can be used (https://oshwlab.com/dirkx/stm25-reference-design_copy)
  
−
[[Bestand:Betaalterminal-prototype-disp-5.svg|150px|As lasercut]]
+
== Activatie ==
 +
 
 +
Zie [[SpaceTegoed#Het_koppelen_van_betaalterminals_aan_het_betaalsysteem]] voor de activatie procedure. Overleg even met het bestuur om je pas ge-accordeert te krijgen voor test/initiatie & test betalingen.
 +
 
 +
== Lasercut prototype ==
 +
 
 +
[[Bestand:Betaalterminal-prototype-disp-5.svg|150px|As lasercut]][[Bestand:Betaalterminal-prototype-disp-6.svg|150px|New version which is more splashproof]]
 +
 
 +
Left is as currently used; right is a more spash proof version meant for plexiglass.
  
 
Settings for the laser cutter: Letters; 1500 at 30%; holes 1000 at 60% from 3mm plexiglass. Order: letters, small holes, big holes and then the outline.
 
Settings for the laser cutter: Letters; 1500 at 30%; holes 1000 at 60% from 3mm plexiglass. Order: letters, small holes, big holes and then the outline.
  
 
Buttons are ~29-30 mm arcade style pushbuttons.
 
Buttons are ~29-30 mm arcade style pushbuttons.
 +
 +
See also this PCB: https://easyeda.com/dirkx/payment-terminal and https://oshwlab.com/dirkx/stm25-reference-design_copy
 +
 +
==== Bill of material ====
 +
 +
[[Bestand:tft-board-1.jpg|800px]]
 +
[[Bestand:tft-board-2.jpg|800px]]
 +
 +
In decreasing cost
 +
 +
# ESP32, 38 pin version; ~7 euro (https://www.amazon.nl/gp/product/B074RG86SR)
 +
# 1.77" 160(RGB)x128 TFT screen; ~7 euro (https://www.amazon.nl/AZDelivery-Display-128x160-compatibel-Inclusief/dp/B07TJGF8HS). Pulls 40+ mAmp; too much for GPIO direct drive.
 +
# 1 RFID reader; ~2.50 Euro; (https://www.amazon.nl/gp/product/B074S9FZC5)
 +
# 2 arcade buttons; ~ 2x2 Euro, donation to the space van Leon. LEDs pull about 11 milliAmps (direct GPIO drive ok). https://www.amazon.nl/EG-booglichten-ingebouwde-schakelaar-verlichte/dp/B01N11BDX9
 +
# Stukje plexiglas uit lasercut restjes
 +
# 3D printed spacers/pinnen van plastic voor RFID reader mount.
 +
# 4 boutjes/moertjes 2.3mm uit space voorraad voor scherm - mag wel metaal zijn.
 +
# Wat draadjes uit electronica voorraad.
 +
# USB kabeltje en adaptortje (lag op tafel).
 +
# Restje hipster hout
 +
 +
In versie 2
 +
# Added capacitor across 5volt
 +
# Added capacitor (10uF) across 3v3 to the TFT
 +
# Added 2 resistors of 2k2 to pull the GPIO pins of the buttons low; as they now just 3 (rather than 4) wires; and we need the common wire to be 5Volt as the LEDs won't light up at 3v3.
 +
 +
Totaal: < 20 euro; 10 minuten 3D printen; 15 minuten lasersnijden; 15 minuten hout zagen, nachtje drogen (dank aan de [[Bandspanner / belt clamp strap]]) en 30 minuten solderen/assemblage.
 +
 +
==== Wiring ====
 +
 +
Code to check buttons and backlight wiring:
 +
 +
<pre>
 +
void setup() {
 +
  Serial.begin(115200);
 +
  Serial.println("Compiled: " __DATE__ " " __TIME__);
 +
 +
  pinMode(32, INPUT);
 +
  pinMode(33, INPUT);
 +
  pinMode(4,OUTPUT);
 +
}
 +
 +
void loop() {
 +
  Serial.print(digitalRead(32));
 +
  Serial.print(" ");
 +
  Serial.print(digitalRead(33));
 +
  Serial.println();
 +
  digitalWrite(4,(millis()/1000) & 1);
 +
  delay(200);
 +
}
 +
</pre>
 +
 +
This will show which buttons are pressed and will flash the TFT.
 +
 +
===== EPS32 board =====
 +
 +
[[Bestand:all-1.jpg|miniatuur]]
 +
 +
[[Bestand:large-board-1.png|400px]]
 +
 +
{| class="wikitable"
 +
|-
 +
! GPIO !! Functie
 +
|-
 +
| Vin || to buttons LED (first revision), to power supply (5V)
 +
|-
 +
| 3V3 || To both boards, VCC, Both Anodes TFT (8,9), to buttons LEDs (revision 3, later), to buttons (rev2)
 +
|-
 +
| GND || To buttons, to both boards (rev 1/3)
 +
|-
 +
| 23 || LED button 1
 +
|-
 +
| 22 || LED button 2
 +
|-
 +
| 32 || Switch button 1; with pull-up & connect to GND for board v1; with 2k2 resistor to ground and switch wired to 5V with 1k2 for revision 2.
 +
|-
 +
| 33 || Switch button 2; with pull-up & connect to GND for board v1; with 2k2 resistor to ground and switch wired to 5V with 1k2 for revision 2.
 +
|-
 +
| 12 || TFT_MOSI
 +
|-
 +
| 14 || TFT_SCLK / clock
 +
|-
 +
| 26 || TFT_CS, SS, Select
 +
|-
 +
| 27 || TFT_DC, A0, data/command
 +
|-
 +
| 4 || TFT_BL, backlight, ''Revision 3 only.''
 +
|-
 +
|  2 || TFT_RESET
 +
|-
 +
| 16 || RFID_SCLK
 +
|-
 +
| 16 || RFID_SCLK
 +
|-
 +
|  5 || RFID_MOSI
 +
|-
 +
| 13 || RFID_MISO
 +
|-
 +
| 25 || RFID_CS, SS, SDA
 +
|-
 +
| 16 || RFID_RESET
 +
|-
 +
| 3 || RFID_IRQ - label is RX0
 +
|}
 +
 +
==== Changes revision 3 ====
 +
 +
# 1k2 / 2k2 resistor divider on the switches; as they are not reliable right now.
 +
# Backlight screen takes about 40mA max; the max draw on the EPS32 is 40mA too; so add backlight switch off with 8-20 ohm resistor or drive it through a fet/transistor; on GPIO 4.
 +
 +
===== Button 1 =====
 +
 +
[[Bestand:Tft-button-1.jpg|miniatuur]]
 +
 +
Wiring for board 2; were we make use of the GPIO _in_put being 5Volt tolerant. And an extra 2k2 Resistor was added to the ground on the PCB.
 +
 +
{| class="wikitable"
 +
|-
 +
! pin !! kleur !! label !! functie
 +
|-
 +
| 1 || geel || Switch || GPIO 32
 +
|-
 +
| 2 || zwart || LED A, Switch || 5V
 +
|-
 +
| 3 || rood || LED K || GPIO 23
 +
|}
 +
 +
===== Button 1 =====
 +
 +
Wiring for board 2; were we make use of the GPIO _in_put being 5Volt tolerant. And an extra 2k2 Resistor was added to the ground on the PCB.
 +
 +
{| class="wikitable"
 +
|-
 +
! pin !! kleur !! label !! functie
 +
|-
 +
| 1 || geel || Switch || GPIO 33
 +
|-
 +
| 2 || zwart || LED K, Switch || GND
 +
|-
 +
| 3 || rood || LED A || GPIO 22
 +
|}
 +
 +
===== RFID =====
 +
 +
[[Bestand:Tft-rfid-1.jpg|miniatuur]]
 +
 +
Zie https://github.com/dirkx/makerspaceleiden-payment-node/blob/a438f2147b141f79ae05a1da6a042f46baa2ddf0/makerspaceleiden-payment-node.ino#L144
 +
 +
{| class="wikitable"
 +
|-
 +
! pin !! kleur !! label !! functie
 +
|-
 +
| 1 || zwart || SDA || RFID_CS, GPIO25
 +
|-
 +
| 2 || rood || SCK || RFID_SCLK, GPIO16
 +
|-
 +
| 3 || wit || MOSI || RFID_MOSI, GPIO5
 +
|-
 +
| 4 || geel || MISO || RFID_MISO, GPIO13
 +
|-
 +
| 5 || orange || IRQ || RFID_IRQ, GPIO3, Labeled RX0
 +
|-
 +
| 6 || groen || GND || GND
 +
|-
 +
| 7 || blauw || RESET || RFID_RESET, GPIO 17
 +
|-
 +
| 8 || paars || 3V3 || 3V3
 +
|}
 +
 +
===== Scherm =====
 +
 +
[[Bestand:Tft-tft-1.jpg|miniatuur]]
 +
 +
Zie https://github.com/dirkx/makerspaceleiden-payment-node/blob/a438f2147b141f79ae05a1da6a042f46baa2ddf0/makerspaceleiden-payment-node.ino#L132
 +
 +
{| class="wikitable"
 +
|-
 +
! pin !! kleur !! label !! functie
 +
|-
 +
| 1 || zwart || GND || GND
 +
|-
 +
| 2 || rood || VCC || 3V3
 +
|-
 +
| 3 || wit || SCK || TFT_SCLK, GPIO14
 +
|-
 +
| 4 || geel || SDA|| TFT_MOSI, GPIO12
 +
|-
 +
| 5 || orange || RES|| TFT_RST, GPIO2
 +
|-
 +
| 6 || groen || RS|| TFT_DC, GPIO27
 +
|-
 +
| 7 || blauw || CS|| TFT_CS, GPIO26
 +
|-
 +
| 8 || paars || LED A || 3V3 with Capacitor.
 +
|}

Huidige versie van 16 nov 2024 om 23:38


Huidige versie voorruimte Huidige versie, voor onderdelen betalen

Prototype voor bier/koffie afrekenen in de voor-ruimte. En achter bij de WC, voor afrekenen moeren, boutjes, etc uit de grijpvoorraad. Zie SpaceTegoed voor een overzicht/plan, Payment and Paring REST protocol for the protocol and [github for code]. Screen documentation is at https://www.displayfuture.com/Display/datasheet/controller/ST7735.pdf. Part of the Space tegoed payment system.

Er is een `extra' unit om mee te ontwikkelen en te debuggen.

Versions build

There are currently two in use

  • In de schone ruimte; board revision 4, Firmware 1.05, 80:7D:3A:D5:46:8C
  • Achter, bij de grijpvoorraad. board revision 3, Firmware 1.05 C8:C9:A3:CB:B6:7C, 192.168.6.200
  • Ontwikkel/test unit; board revision 4, Firmware 1.XX 0:5A:1B:67:21:AB -- niet aangesloten normaal gesproken.

Terminal met beeldscherm

Prototype met keuzes Possibly screen Possibly screen Possibly PCB Possibly PCB

Video: https://player.vimeo.com/video/628163050?h=e344411a85

Bij dit type terminal kun je kiezen wat je betaald met een "+" en "-" knop.

  1. Het display toont de text 'Swipe to Pay" met daaronder iets als "Bier" of "Koffie" en het bedrag.
  2. Met de + en - knop blader je door de opties. Totdat je de juiste hebt.
  3. Swipe je tag langs de terminal.
  4. Indien het bedrag groter is dan 5 euro komt de vraag "Pay <bedrag>" -- OK of Cancel. Bij cancel ga je terug naar stap 1. Bij Pay naar de volgende stap.
  5. Het display toont `paying' ... en tot slot 'Paid by <je eigen naam>'.
  6. En gaat daarna terug naar stap één.

Indien er iets fout gaat zie je op het scherm een foutmelding. Op de server wordt bijgehouden wat er fout ging. Als gebruiker kun je in dit geval niet veel meer doen dan cash betalen, het bij de mailing lijst melden, of het later weer proberen. Na een minuut geen gebruik gaat de terminal ook altijd terug naar stap 1.

Troubleshooting

First thing to check are the pairing in mijn.makerspaceleiden.nl and then check the logs on the server /var/logs/crm/crm.debug and the MQTT logs in /var/log/mqtt

These will tell you recent reported states and the most recently known IP addresses claimed.

It is possible to 'telnet' into these units (on the normal telnet port #23) and see what normally would come out of the serial port. The units also sent their logging to syslog (to the spaceserver, 192.168.6.1).

Check MQTT, the firewall, use a [MDNS] [resolver] (or simply the Arduino IDE) to discover their IP address. You can do this from the RaspPi next to the Vinyl Cutter / Vinylsnijder / Snijplotter.

MAC Versie Mac address IP address
Grijpvoorraad 1.04 C8:C9:A3:CB:B6:7C 192.168.6.200
Voorruimte 1.04 80:7D:3A:D5:46:8C 192.168.6.189

Version deployed as of November 2021: https://github.com/dirkx/makerspaceleiden-payment-node/releases/tag/v1.04

A typical session looks like: 

$ telnet 10.13.0.241 23
unset@tft-1.04-c767b4 Telnet connected C8:C9:A3:C7:67:B4
10.13.0.1:58451 Connected.
fetching prices
HTTP reponse: 200
Payload: {"name": "tft-1.04-c767b4", "description": "Laswerkplaats", "pricelist": [{"name": "mig-gas", "description": "Mis gas, beetje", "price": "1.00", "default": true}, {"name": "C3H8", "description": "Veel gas (mig, tig of propaan)", "price": "5.00"}, {"name": "meer mig-gas", "description": "Mig gas; meer", "price": "2.50"}]}
parsed as json fine
     mig-gas * 1.00
        C3H8   5.00
meer mig-gas   2.50
Pricelist fetched; 3 items
got prices
Bad read (was card removed too quickly ? )


Furthermore - if you connect to space.makerspaceleiden.nl via MQTT - then you can also see the output: 

TOPIC: ac/log/tft-1.04-cbb67c 
   Grijpvoorraad {
  "rfid_scans": 0,
  "rfid_misses": 0,
  "ota": true,
  "state": 3,
  "IP_address": "192.168.6.200",
  "Mac_address": "C8:C9:A3:CB:B6:7C",
  "Paid": 0,
  "Version": "1.04",
  "Firmware": "tft-1.04-cbb67c",
  "heap": 139667
}

Any error message (post joining the Wifi network) will show up here. If the issue is prior to joining WiFi - you will have to connect a USB cable (Baudrate 115200, 8N1). The Raspi has the right drivers installed.

Finally - all logging is also sent to syslog on the local server in the space; at Facility local0 (16), Severity debug (7).

Building one

Prototype version 2

If you need to build one - contact Dirk-Willem van Gulik - as we have a few `one board' versions that perhaps can be used (https://oshwlab.com/dirkx/stm25-reference-design_copy)

Activatie

Zie SpaceTegoed#Het_koppelen_van_betaalterminals_aan_het_betaalsysteem voor de activatie procedure. Overleg even met het bestuur om je pas ge-accordeert te krijgen voor test/initiatie & test betalingen.

Lasercut prototype

As lasercutNew version which is more splashproof

Left is as currently used; right is a more spash proof version meant for plexiglass.

Settings for the laser cutter: Letters; 1500 at 30%; holes 1000 at 60% from 3mm plexiglass. Order: letters, small holes, big holes and then the outline.

Buttons are ~29-30 mm arcade style pushbuttons.

See also this PCB: https://easyeda.com/dirkx/payment-terminal and https://oshwlab.com/dirkx/stm25-reference-design_copy

Bill of material

Tft-board-1.jpg Tft-board-2.jpg

In decreasing cost

  1. ESP32, 38 pin version; ~7 euro (https://www.amazon.nl/gp/product/B074RG86SR)
  2. 1.77" 160(RGB)x128 TFT screen; ~7 euro (https://www.amazon.nl/AZDelivery-Display-128x160-compatibel-Inclusief/dp/B07TJGF8HS). Pulls 40+ mAmp; too much for GPIO direct drive.
  3. 1 RFID reader; ~2.50 Euro; (https://www.amazon.nl/gp/product/B074S9FZC5)
  4. 2 arcade buttons; ~ 2x2 Euro, donation to the space van Leon. LEDs pull about 11 milliAmps (direct GPIO drive ok). https://www.amazon.nl/EG-booglichten-ingebouwde-schakelaar-verlichte/dp/B01N11BDX9
  5. Stukje plexiglas uit lasercut restjes
  6. 3D printed spacers/pinnen van plastic voor RFID reader mount.
  7. 4 boutjes/moertjes 2.3mm uit space voorraad voor scherm - mag wel metaal zijn.
  8. Wat draadjes uit electronica voorraad.
  9. USB kabeltje en adaptortje (lag op tafel).
  10. Restje hipster hout

In versie 2

  1. Added capacitor across 5volt
  2. Added capacitor (10uF) across 3v3 to the TFT
  3. Added 2 resistors of 2k2 to pull the GPIO pins of the buttons low; as they now just 3 (rather than 4) wires; and we need the common wire to be 5Volt as the LEDs won't light up at 3v3.

Totaal: < 20 euro; 10 minuten 3D printen; 15 minuten lasersnijden; 15 minuten hout zagen, nachtje drogen (dank aan de Bandspanner / belt clamp strap) en 30 minuten solderen/assemblage.

Wiring

Code to check buttons and backlight wiring: 

void setup() {
  Serial.begin(115200);
  Serial.println("Compiled: " __DATE__ " " __TIME__);

  pinMode(32, INPUT);
  pinMode(33, INPUT);
  pinMode(4,OUTPUT);
}

void loop() {
  Serial.print(digitalRead(32));
  Serial.print(" ");
  Serial.print(digitalRead(33));
  Serial.println();
  digitalWrite(4,(millis()/1000) & 1);
  delay(200);
}

This will show which buttons are pressed and will flash the TFT.

EPS32 board
All-1.jpg

Large-board-1.png

GPIO Functie
Vin to buttons LED (first revision), to power supply (5V)
3V3 To both boards, VCC, Both Anodes TFT (8,9), to buttons LEDs (revision 3, later), to buttons (rev2)
GND To buttons, to both boards (rev 1/3)
23 LED button 1
22 LED button 2
32 Switch button 1; with pull-up & connect to GND for board v1; with 2k2 resistor to ground and switch wired to 5V with 1k2 for revision 2.
33 Switch button 2; with pull-up & connect to GND for board v1; with 2k2 resistor to ground and switch wired to 5V with 1k2 for revision 2.
12 TFT_MOSI
14 TFT_SCLK / clock
26 TFT_CS, SS, Select
27 TFT_DC, A0, data/command
4 TFT_BL, backlight, Revision 3 only.
2 TFT_RESET
16 RFID_SCLK
16 RFID_SCLK
5 RFID_MOSI
13 RFID_MISO
25 RFID_CS, SS, SDA
16 RFID_RESET
3 RFID_IRQ - label is RX0

Changes revision 3

  1. 1k2 / 2k2 resistor divider on the switches; as they are not reliable right now.
  2. Backlight screen takes about 40mA max; the max draw on the EPS32 is 40mA too; so add backlight switch off with 8-20 ohm resistor or drive it through a fet/transistor; on GPIO 4.
Button 1
Tft-button-1.jpg

Wiring for board 2; were we make use of the GPIO _in_put being 5Volt tolerant. And an extra 2k2 Resistor was added to the ground on the PCB.

pin kleur label functie
1 geel Switch GPIO 32
2 zwart LED A, Switch 5V
3 rood LED K GPIO 23
Button 1

Wiring for board 2; were we make use of the GPIO _in_put being 5Volt tolerant. And an extra 2k2 Resistor was added to the ground on the PCB.

pin kleur label functie
1 geel Switch GPIO 33
2 zwart LED K, Switch GND
3 rood LED A GPIO 22
RFID
Tft-rfid-1.jpg

Zie https://github.com/dirkx/makerspaceleiden-payment-node/blob/a438f2147b141f79ae05a1da6a042f46baa2ddf0/makerspaceleiden-payment-node.ino#L144

pin kleur label functie
1 zwart SDA RFID_CS, GPIO25
2 rood SCK RFID_SCLK, GPIO16
3 wit MOSI RFID_MOSI, GPIO5
4 geel MISO RFID_MISO, GPIO13
5 orange IRQ RFID_IRQ, GPIO3, Labeled RX0
6 groen GND GND
7 blauw RESET RFID_RESET, GPIO 17
8 paars 3V3 3V3
Scherm
Tft-tft-1.jpg

Zie https://github.com/dirkx/makerspaceleiden-payment-node/blob/a438f2147b141f79ae05a1da6a042f46baa2ddf0/makerspaceleiden-payment-node.ino#L132

pin kleur label functie
1 zwart GND GND
2 rood VCC 3V3
3 wit SCK TFT_SCLK, GPIO14
4 geel SDA TFT_MOSI, GPIO12
5 orange RES TFT_RST, GPIO2
6 groen RS TFT_DC, GPIO27
7 blauw CS TFT_CS, GPIO26
8 paars LED A 3V3 with Capacitor.
Overgenomen van "https://wiki.makerspaceleiden.nl/mediawiki/index.php?title=Payment_Terminal_with_TFT_screen&oldid=17398"