A payment device powered by IOTA CClient on ESP32.
It generates a QR code from an unspent address for costumers paying IOTA tokens, after the owner withdrawal tokens from this address the device will seek for next unspent address and refresh QR code, it prevents to reuse an address.
Receiving tokens
Updating the QR code after a withdraw
Please follow documentations to setup your toolchain and development framework.
Linux and MacOS:
Windows:
Notice: We use the ESP-IDF v3.3.1
git clone -b v3.3.1 --recursive https://github.com/espressif/esp-idf.git
Now, you can test your develop environment via the hello_world project.
cd ~/esp
cp -r $IDF_PATH/examples/get-started/hello_world .
idf.py menuconfig
idf.py build
idf.py -p /dev/ttyUSB0 flash && idf.py -p /dev/ttyUSB0 monitorThe output would be something like:
I (0) cpu_start: App cpu up.
I (184) heap_init: Initializing. RAM available for dynamic allo
cation:
I (191) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (197) heap_init: At 3FFB2EF8 len 0002D108 (180 KiB): DRAM
I (204) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (210) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (216) heap_init: At 40089560 len 00016AA0 (90 KiB): IRAM
I (223) cpu_start: Pro cpu start user code
I (241) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
Hello world!
This is ESP32 chip with 2 CPU cores, WiFi/BT/BLE, silicon revision 1, 4MB external flash
Restarting in 10 seconds...
Restarting in 9 seconds...You can press Ctrl + ] to exit the monitor and ready for the next setup.
git clone --recursive https://github.com/oopsmonk/iota_esp32_cashier.gitOr (if you didn't put the --recursive command during clone)
git clone https://github.com/oopsmonk/iota_esp32_cashier.git
cd iota_esp32_cashier
git submodule update --init --recursiveThe init.sh helps us to generate files and switch to the right branch for the components.
Linux and MacOS:
cd iota_esp32_cashier
bash ./init.shWindows: use Git Bash to run the command above.
In this step, you need to set up the WiFi, SNTP, IRI node, and a receiver.
idf.py menuconfig
# WiFi SSID & Password
[IOTA Cashier] -> [WiFi]
# SNTP Client
[IOTA Cashier] -> [SNTP]
# Default IRI node
[IOTA Cashier] -> [IRI Node]
# The time of monitoring
[IOTA Cashier] -> (30) Monitor interval (s)
# Do you wanna update address automatically?
[IOTA Cashier] -> [ ] Auto refresh address
# Enable LCD driver?
[IOTA Cashier] -> [ ] Support LCD
# LCD driver config
[Component config] -> ST7735 Configuration
You can check configures in sdkconfig file.
Please make sure you assigned the receiver(CONFIG_MSG_RECEIVER), Here is an example for your configuration:
LCD support with auto address update
CONFIG_WIFI_SSID="YOUR_SSID"
CONFIG_WIFI_PASSWORD="YOUR_PWD"
CONFIG_SNTP_SERVER="pool.ntp.org"
CONFIG_SNTP_TZ="CST-8"
CONFIG_IRI_NODE_URI="nodes.thetangle.org"
CONFIG_IRI_NODE_PORT=443
CONFIG_ENABLE_HTTPS=y
CONFIG_INTERVAL=30
CONFIG_ADDRESS_REFRESH=y
# IOTA Seed, it's a 81 characters string
CONFIG_IOTA_SEED="SEED9SEED9SEED9SEED9SEED9SEED9SEED9SEED9SEED9SEED9SEED9SEED9SEED9SEED9SEED9SEED9S"
# IOTA security level, could be 1, 2, or 3.
CONFIG_IOTA_SECURITY=2
# The start index of finding an unspent address.
CONFIG_IOTA_ADDRESS_START_INDEX=0
CONFIG_FTF_LCD=y
CONFIG_ST7735_BL_PIN=17
CONFIG_USE_COLOR_RBG565=y
# CONFIG_USE_COLOR_RGB565 is not set
CONFIG_ST7735_HOST_VSPI=y
# CONFIG_ST7735_HOST_HSPI is not setLCD support without auto address update
CONFIG_WIFI_SSID="YOUR_SSID"
CONFIG_WIFI_PASSWORD="YOUR_PWD"
CONFIG_SNTP_SERVER="pool.ntp.org"
CONFIG_SNTP_TZ="CST-8"
CONFIG_IRI_NODE_URI="nodes.thetangle.org"
CONFIG_IRI_NODE_PORT=443
CONFIG_ENABLE_HTTPS=y
CONFIG_INTERVAL=30
CONFIG_ADDRESS_REFRESH=
# Address with checksum, it's a 90 characters string
CONFIG_IOTA_RECEIVER="RECEIVER9CHECHSUM9RECEIVER9CHECHSUM9RECEIVER9CHECHSUM9RECEIVER9CHECHSUM9RECEIVER9CHECHSUM9"
CONFIG_FTF_LCD=y
CONFIG_ST7735_BL_PIN=17
CONFIG_USE_COLOR_RBG565=y
CONFIG_USE_COLOR_RGB565=
CONFIG_ST7735_HOST_VSPI=y
CONFIG_ST7735_HOST_HSPI=The CONFIG_SNTP_TZ follows the POSIX Timezone string
idf.py build
idf.py -p /dev/ttyUSB0 flash && idf.py -p /dev/ttyUSB0 monitorOutput:
I (4310) main: WiFi Connected
I (4310) main: IRI Node: nodes.thetangle.org, port: 443, HTTPS:True
I (4380) main: Initializing SNTP: pool.ntp.org, Timezone: CST-8
I (4390) main: Waiting for system time to be set... (1/10)
I (6390) main: The current date/time is: Wed Oct 2 17:06:29 2019
I (6450) cashier: Get unspent address from 5
E (11380) task_wdt: Task watchdog got triggered. The following tasks did not reset the watchdog in time:
E (11380) task_wdt: - IDLE0 (CPU 0)
E (11380) task_wdt: Tasks currently running:
E (11380) task_wdt: CPU 0: main
E (11380) task_wdt: CPU 1: IDLE1
E (21940) task_wdt: Task watchdog got triggered. The following tasks did not reset the watchdog in time:
E (21940) task_wdt: - IDLE0 (CPU 0)
E (21940) task_wdt: Tasks currently running:
E (21940) task_wdt: CPU 0: main
E (21940) task_wdt: CPU 1: IDLE1
Get balance [6]RECEIVER9ADDRESS9RECEIVER9ADDRESS9RECEIVER9ADDRESS9RECEIVER9ADDRESS9RECEIVER9ADDR
I (29960) main: Initial balance: 4800i, interval 30
Get balance [6]RECEIVER9ADDRESS9RECEIVER9ADDRESS9RECEIVER9ADDRESS9RECEIVER9ADDRESS9RECEIVER9ADDR
= 4800iCtrl + ] to exit.
ESP32 VSPI
ESP32 HVSPI
CONFIG_IOTA_RECEIVER or CONFIG_IOTA_SEED is not set or is invalid:
I (0) cpu_start: Starting scheduler on APP CPU.
E (3443) main: please set a valid hash(CONFIG_IOTA_RECEIVER or CONFIG_IOTA_SEED) in sdkconfig!
I (3443) main: Restarting in 5 seconds...
I (4443) main: Restarting in 4 seconds...
I (5443) main: Restarting in 3 seconds...CONFIG_MAIN_TASK_STACK_SIZE is too small, you need to enlarge it:
***ERROR*** A stack overflow in task main has been detected.
abort() was called at PC 0x4008af7c on core 0