The TanglePigeon carries a message to the Tangle.
This is an example project shows how to send messages to the Tangle with CClient library and ESP32, the message can be triggered via GPIO (BOOT button) or Timer.
The message is in JSON format shown below:
{
"TanglePigeon":"v0.0.1",
"Trigger":"TIMER",
"LocalTime":"2019-08-12 13:23:47",
"TimeZone":"CST-8",
"Data":"Hello IOTA"
}
You can change or add some sensor data to the message as you need, like temperature, humidity, location...
Notice: Messages will be removed after the IRI snapshot because they are zero-value transactions.
Please follow documentations to setup your toolchain and development framework.
Linux:
Windows:
Notice: We use the ESP-IDF v3.3.1, make sure you clone the right branch of ESP-IDF
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/tangle_pigeon_esp32.gitOr (if you didn't put the --recursive command during clone)
git clone https://github.com/oopsmonk/tangle_pigeon_esp32.git
cd tangle_pigeon_esp32
git submodule update --init --recursiveThe init.sh helps us to generate files and switch to the right branch for the components.
Linux:
cd tangle_pigeon_esp32
bash ./init.shWindows: run the command under Git Bash.
In this step, you need to set up the WiFi, SNTP, IRI node, and the receiver.
idf.py menuconfig
# WiFi SSID & Password
[Tangle Pigeon] -> [WiFi]
# SNTP Client
[Tangle Pigeon] -> [SNTP]
# Default IRI node
[Tangle Pigeon] -> [IRI Node]
# Receiver address
[Tangle Pigeon] -> () Receiver address
# Wake up timer
[Tangle Pigeon] -> (5) Wake up time (minutes)
You can check configures in sdkconfig file.
Please make sure you assigned the receiver(CONFIG_MSG_RECEIVER), Here is an example for your configuration:
CONFIG_SNTP_SERVER="pool.ntp.org"
CONFIG_SNTP_TZ="CST-8"
CONFIG_MSG_RECEIVER="RECEIVER9ADDRESS9RECEIVER9ADDRESS9RECEIVER9ADDRESS9RECEIVER9ADDRESS9RECEIVER9ADDR"
CONFIG_WAKE_UP_TIME=5
CONFIG_IOTA_DEPTH=6
CONFIG_IOTA_MWM=9
CONFIG_IRI_NODE_URI="nodes.devnet.iota.org"
CONFIG_IRI_NODE_PORT=443
CONFIG_ENABLE_HTTPS=y
CONFIG_WIFI_SSID="MY_SSID"
CONFIG_WIFI_PASSWORD="MY_PWD"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 (3724) TanglePigeon: Connected to AP
I (3724) TanglePigeon: IRI Node: nodes.thetangle.org, port: 443, HTTPS:True
I (3734) TanglePigeon: Initializing SNTP: pool.ntp.org, Timezone: CST-8
I (3744) TanglePigeon: Waiting for system time to be set... (1/10)
I (5744) TanglePigeon: The current date/time is: Tue Aug 13 13:45:22 2019
Power on reset
I (24624) message-builder: transaction sent: OK
I (25634) TanglePigeon: Enabling timer wakeup, 2 minutes
I (25634) TanglePigeon: Entering deep sleep
I (25634) wifi: state: run -> init (0)
I (25634) wifi: pm stop, total sleep time: 19342634 us / 22908089 us
I (25644) wifi: n:11 0, o:11 0, ap:255 255, sta:11 0, prof:1
I (25664) wifi: flush txq
I (25664) wifi: stop sw txq
I (25664) wifi: lmac stop hw txq
E (25664) wifi: esp_wifi_connect 968 wifi not start
ets Jun 8 2016 00:22:57
rst:0x5 (DEEPSLEEP_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0018,len:4
load:0x3fff001c,len:6160
ho 0 tail 12 room 4
load:0x40078000,len:10180
load:0x40080400,len:6660
entry 0x40080764
I (31) boot: ESP-IDF v3.2.2 2nd stage bootloader
I (31) boot: compile time 12:50:41
I (31) boot: Enabling RNG early entropy source...
......
I (3224) TanglePigeon: Connected to AP
I (3224) TanglePigeon: IRI Node: nodes.thetangle.org, port: 443, HTTPS:True
I (3234) TanglePigeon: Initializing SNTP: pool.ntp.org, Timezone: CST-8
I (3244) TanglePigeon: Waiting for system time to be set... (1/10)
I (5244) TanglePigeon: The current date/time is: Tue Aug 13 13:47:47 2019
Wake up from timer. Time spent in deep sleep: 125572ms
I (38344) message-builder: transaction sent: OK
I (39344) TanglePigeon: Enabling timer wakeup, 2 minutes
I (39344) TanglePigeon: Entering deep sleep
I (39344) wifi: state: run -> init (0)
I (39344) wifi: pm stop, total sleep time: 32638765 us / 36729138 us
I (39354) wifi: n:11 0, o:11 0, ap:255 255, sta:11 0, prof:1
I (39384) wifi: flush txq
I (39384) wifi: stop sw txq
I (39384) wifi: lmac stop hw txq
E (39384) wifi: esp_wifi_connect 968 wifi not startCtrl + ] to exit.
A transaction screenshot:
CONFIG_MSG_RECEIVER is not set or is invalid:
I (0) cpu_start: Starting scheduler on APP CPU.
E (243) TanglePigeon: please set a valid address hash(CONFIG_MSG_RECEIVER) in sdkconfig!
I (243) TanglePigeon: Restarting in 30 seconds...
I (1253) TanglePigeon: Restarting in 29 seconds...
I (2253) TanglePigeon: Restarting in 28 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