rockblock9704 0.1.11

RockBLOCK 9704 serial tools

RockBLOCK 9704

• The official RockBLOCK 9704 Python Library made by Ground Control.

• This library provides an easy to use Python interface for the RockBLOCK 9704 serial tools, originally written in C.

• The source for this project can be found on https://github.com/rock7/RockBLOCK-9704.

• For more information on the RockBLOCK 9704, see https://www.groundcontrol.com/product/rockblock-9704/

• All Python examples can be found here

Requirements

• Python 3.8+

• A RockBLOCK 9704

Installation

The RockBLOCK 9704 library can be installed from PyPI:

pip install rockblock9704

Connecting to your RockBLOCK

Communication with the RockBLOCK is conducted via serial, either with USB serial or using the GPIO pins on your device.

Connecting via USB

Once your rockBLOCK has been connected to your device via USB you will need to find its local address.

Linux / macOS

List all local devices:

ls /dev/tty*

The name will vary depending on machine but will generally include USB in the name (e.g. /dev/ttyUSB0 or /dev/tty.usbserial-FTH9I1S5)

Windows

List COM devices:

mode

When connected to my machine the port was COM6 but this will vary, it can be helpful to run the command before connecting to see what port becomes active.

Begin the Serial Connection

Once you have the address of your device, create an instance of RockBlock9704 and call the begin method.

from rockblock9704 import *

rb = RockBlock9704()
connected = rb.begin(<device address>)

if connected:
    print("Successful connection!")

The begin() function must be called before any other RockBLOCK functions can be used. You should always check that begin() has returned true to indicate a successful connection, otherwise further interaction with the RockBLOCK will fail.

There are several functions that allow monitoring of RockBLOCK and modem information.

# Board Information
hardware_version = rb.get_hardware_version()
print("Hardware version: {}".format(hardware_version))
firmware_version = rb.get_firmware_version()
print("Firmware version: {}".format(firmware_version))
board_temp = rb.get_board_temp()
print("Board temperature: {}°C".format(board_temp))

# Identifying Information
serial_number = rb.get_serial_number()
print("Serial number: {}".format(serial_number))
imei = rb.get_imei()
print("IMEI: {}".format(imei))
iccid = rb.get_iccid()
print("ICCID: {}".format(iccid))

card_present = rb.get_card_present()
sim_connected = rb.get_sim_connected()
if card_present and sim_connected:
    print("Sim card valid")

Connecting via GPIO

To connect to your RockBLOCK via the GPIO pins on your device, you first create a GpioConfig object in which you specify the GPIO pins to use. In the example a single GPIO card is provided for all pins but individual cards can be specified if all pins are not shared.

from rockblock9704 import *

# Set power enabled to pin 1, iridium enabled to pin 2 and booted to pin 3. Default card is provided.
gpio_config = GpioConfig(1, 2, 3, default_card="/dev/gpiochip0")

See the GPIO connect example for more help.

Begin the Serial Connection

Once you have created your GpioConfig object, you can call begin_gpio() to initialise the connection. In the example /dev/tty0 is specified as the port to bind the connection to once successfully begun. The timeout provided is in seconds.

from rockblock9704 import *

# Create your RockBlock object
rb = RockBlock9704()

# Set power enabled to pin 1, iridium enabled to pin 2 and booted to pin 3. Default card is provided.
gpio_config = GpioConfig(1, 2, 3, default_card="/dev/gpiochip0")

# Initialise the serial connection via GPIO
connected = rb.begin_gpio("/dev/tty0", gpio_config, timeout=60)

if connected:
    print("Successful connection!")

Sending and Receiving

After a serial connection has been successfully established, you can start sending and receiving messages with your RockBLOCK.

Send a Message

Data can be transmitted from the RockBLOCK by using the send_message() function. The function will attempt to send your message until it is successful and returns true, or the timout expires (default 30 seconds) in which case it will return false.

# Always check if begin has returned successfully
if connected:

    # Sending message
    sent = rb.send_message(b"Hello, world!")

    if sent:
        print("Message sent!")
    else:
        # If the timeout expires
        print("Sending failed")

A custom timeout can be set if you want the send_message() function to attempt sending for greater or less than 30 seconds.

# Always check if begin has returned successfully
if connected:

    # Attempt to send for 60 seconds before failing
    sent = rb.send_message(b"Hello, world!", timeout=60)

    if sent:
        print("Message sent!")
    else:
        # could not send within 60 seconds
        print("Sending failed")

By default the message will be sent to the raw Cloudloop topic (244) but any topic can be specified by calling send_message(<message>, topic=<topic>).

# Sending message to topic 999
rb.send_message(b"Hello, world!", topic=999)

# Sending messages to the Cloudloop colour topics
rb.send_message(b"Hello, Purple!", topic=rb.PURPLE_TOPIC)
rb.send_message(b"Hello, Pink!", topic=rb.PINK_TOPIC)
rb.send_message(b"Hello, Red!", topic=rb.RED_TOPIC)
rb.send_message(b"Hello, Orange!", topic=rb.ORANGE_TOPIC)
rb.send_message(b"Hello, Yellow!", topic=rb.YELLOW_TOPIC)

See the send message example for more help.

Receive a Message

Data sent to the RockBLOCK can be retrieved using the receive_message() function, this will return None if no messages are available.

# Always check if begin has returned successfully
if connected:

    # Check for a message
    message = rb.receive_message()

    if message is not None:
        print("Message Received!")
        print(message)
    else:
        print("No messages")

A specific topic can be provided to fetch only messages sent to that topic

message = rb.receive_message(topic=rb.ORANGE_TOPIC)

See the receive message example for more help.

Send a Message to the RockBLOCK (Cloudloop)

Cloudloop Data users can use the Cloudloop API to send messages direct to their RockBLOCK(s) very easily. All API calls require a user token, guidance for acquiring a token as well as API usage is found in the Cloudloop Data Knowledgebase.

import requests

USER_TOKEN = "<token>"
THING_ID = "<thing-id>"
MESSAGE = "SGVsbG8sIHdvcmxkIQ=="  # Base64 'Hello, world!'
TOPIC = "IMT_TOPIC_RAW"

payload = {"token": USER_TOKEN, "thing": THING_ID, "message": MESSAGE, "topic": TOPIC}

requests.post("https://api.cloudloop.com/Data/DoSendImtMessage", json=payload)

Alternatively if you have more than one RockBLOCK, they can be put in a Thing Group and a message sent to all with one request.

import requests

USER_TOKEN = "<token>"
GROUP_ID = "<group-id>"
MESSAGE = "SGVsbG8sIHdvcmxkIQ=="  # Base64 'Hello, world!'
TOPIC = "IMT_TOPIC_RAW"

payload = {"token": USER_TOKEN, "thingGroup": GROUP_ID, "message": MESSAGE, "topic": TOPIC}

requests.post("https://api.cloudloop.com/Data/DoSendImtMessageForThingGroup", json=payload)

Check RockBLOCK Signal

You can check the signal strength of the RockBLOCK to the Iridium network using the get_signal() function. Signal strength can vary greatly depending where the satellites are in their orbit, do not be concerned if sometimes the signal goes from 5, max signal, to 0, no signal frequently.

if connected:

    # Check signal (0 - 5)
    signal = rb.get_signal()

    if signal > 0:
        print("We have an active IMT connection")
    else:
        print("Unable to contact satellites")