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2. Firmware & Program 2.0
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Unit NbIoT2
Example
Connect to MQTT to send subscription messages
from m5stack import *
from m5stack_ui import *
from uiflow import *
import unit
screen = M5Screen()
screen.clean_screen()
screen.set_screen_bg_color(0xFFFFFF)
nbiot2_0 = unit.get(unit.NBIOT2, unit.PORTC)
nbiot2_0.mqtt_service_config('mqtt.m5stack.com', 1883, '', '', '', 120)
while True:
if True & (nbiot2_0.mqtt_server_is_connect()):
nbiot2_0.mqtt_publish_topic('nbiot001', 'test', 0)
wait_ms(2)API
print((str('card status:') + str((nbiot2_0.check_SIM_card()))))- Check Modem SIM Card Status (returns bool)
nbiot2_0.debug = True- Enable AT Command Debug Logging
print((str('network status:') + str((nbiot2_0.get_gprs_status()))))- Get GPRS Network Status (returns int)
print((str('model identification:') + str((nbiot2_0.get_identification()))))- Get Model Identifier (returns string)
print((str('identification number:') + str((nbiot2_0.get_IMEI()))))- Get Device ID (returns string)
print((str('cid:') + str((nbiot2_0.get_PDP_context_ip(0)))))- Get IP Address for PDP Context 0 (returns string)
print((str('signal strength:') + str((nbiot2_0.get_single_quality()))))- Get Signal Strength (returns int)
print((str('data content:') + str((nbiot2_0.http_data))))- Retrieve HTTP Response Body (returns string)
nbiot2_0.http_request(0, '', {}, {})- Send HTTP Network Request
print((str('response status:') + str((nbiot2_0.http_status_code))))- Send HTTP GET Request and Retrieve Headers
nbiot2_0.http_terminate()- Check HTTP Server Termination Status
nbiot2_0.mqtt_poll()- MQTT Polling Loop
nbiot2_0.mqtt_publish_topic('', '', 0)- Publish MQTT Message with Topic, Payload, and QoS Level
nbiot2_0.mqtt_server_disconnect()- Disconnect from MQTT Server
print((str('server status:') + str((nbiot2_0.mqtt_server_is_connect()))))- Check MQTT Server Connection Status (returns bool)
nbiot2_0.mqtt_service_config('mqtt.m5stack.com', 1883, '', '', '', 120)- Configure MQTT Parameters
nbiot2_0.mqtt_server_connect(0)- Connect to MQTT Server with Clean Session Disabled
nbiot2_0.mqtt_subscribe_topic('', nbiot2_0_mqtt_cb_func, 0)- Subscribe to MQTT Topic with QoS Level
def nbiot2_0_mqtt_cb_func(mq_topic, mq_payload):
global nbiot_topic, nbiot_msg
nbiot_topic = mq_topic
nbiot_msg = mq_payload
pass- Receive Subscribed MQTT Messages
nbiot2_0.mqtt_unsubscribe_topic('')- Unsubscribe from MQTT Topic
nbiot2_0.set_enable_PDP_context('cmnbiot')- Configure PDP Context APN
nbiot2_0.uart_port_id(1)- Set Core UART Interface ID