Level up your Twilio API skills in TwilioQuest, an educational game for Mac, Windows, and Linux. Download Now
Build the future of communications.
Start building for free
  • By Christine Sunu
    Getting Started with Super SIM and the Adafruit Feather FONA 32u4 super sim adafruit fona 32u4 header

    Today, Twilio released Super SIM to public beta. Super SIM works all over the world and gives developers the ability to choose the networks that their devices connect to and monitor the data consumed by each SIM. You can order your own Super SIM through the Twilio Console and try it out.

    Super SIM is versatile and works with CAT-M1, LTE, and 2G/3G networks. I tested Super SIM with a few boards I had lying around the house, including the Adafruit Feather FONA 32u4.

    The Adafruit Feather 32u4 FONA pinout

    The Adafruit Feather FONA 32u4 is a cellular board from Adafruit based on the Feather ecosystem that uses the Simcom SIM800H modem. (You may remember it from this tutorial on building a mailbox notifier.) It can be programmed with the Arduino IDE. Here’s how you use it with Super SIM and test that it is online with a Machine-to-Machine (M2M) command sent …

    Read More
  • By Christine Sunu
    Getting Started with Super SIM and the Arduino MKR GSM 1400 super sim arduino mkr gsm 1400

    Today, Twilio released Super SIM into public beta. Super SIM works all over the world and gives developers the ability to choose the networks that their Super SIMs use and monitor the data coming in from each SIM. You can order your own Super SIM through the Twilio Console and try it out.

    Super SIM is versatile and works with CAT-M1, LTE, and 2G/3G networks. I tested Super SIM with a few boards I had lying around the house, including the Arduino MKR GSM 1400.

    Arduino MKR GSM 1400 pinout diagram with labels
    Arduino MKR GSM 1400

    The MKR GSM 1400 is an SAMD-based board from Arduino that uses the uBlox SARA-U201. It can be programmed using the Arduino IDE. Here’s how you use it with Super SIM and test that it is online with a Machine-to-Machine (M2M) command sent from the Super SIM API.

    This guide requires a configured Super SIM. If you haven’t set …

    Read More
  • By Christine Sunu
    Build an IoT Mailbox Sensor with a Twilio SIM and M2M Commands header-mail-sensor.png

    The other week, I talked to Stacey Higginbotham about how to get started in IoT. According to Stacey, a lot of people ask her about building mailbox sensors that tell you when the mail has come. This kind of hack is especially useful for those with mailboxes far from their front doors.

    If your mailbox is far away, there’s a good chance your Wi-Fi won’t reach, and neither will your power. We can build a battery-powered cellular device that you can put in your mailbox that senses when your mail is here and texts you when someone has opened it.

    Enter: the MailPig

    The device in an egg-shaped enclosure sitting inside a mailbox

    MailPig waits for someone to open your mailbox and then sends you a text about it. You can configure the number (or numbers) to text and the message you want MailPig to send in the using Twilio Functions.

    An animation showing the device waking up and sending an M2M command to Twilio, which in turn sends an SMS to a phone.

    MailPig sleeps until it senses light, then it …

    Read More
  • By Christine Sunu
    M2M to SMS: Send a text from your IoT device with Twilio M2M Commands and Twilio Functions M2M-to-SMS-twilio-functions-header

    Twilio’s Machine-to-Machine (M2M) commands help you quickly send data directly from your IoT device to the internet and vice versa. These messages are good options for occasional commands; you could wake a device by sending a command from a server, or you could send a message to your server when your device wakes up.

    If your device can send an SMS, it can also send a Twilio M2M command. Development boards like the Adafruit Feather FONA 32u4 are well set up to send an SMS using a Programmable Wireless SIM. You simply have your device send an SMS to the short code 2936, and the command will appear in your Twilio Console.

    You can take these commands and use them with Twilio’s other fantastic APIs to send texts, WhatsApp messages, and emails, make phone calls, start video chats, or trigger additional M2M commands.

    The possibilities are endless, but …

    Read More
  • By Christine Sunu
    How I Made a Data Tracker for My Sourdough Starter sourdio-build-it-bread-data-tracker

    Internet connected sourdough fitness tracker

    A sourdough starter monitor with a cute face next to a bowl and a small cup of flour

    A sourdough starter is a little yeast-driven pet that eats flour and water and makes sourdough. More and more people are keeping these delightful critters in their houses, feeding them when they start to look sluggish and baking bread with them every few days.

    With Twilio's Narrowband IoT Developer Kit, we can build a little monitor that helps us keep track of our starter's temperature, humidity, and rise.

    Why Narrowband?

    Twilio's Narrowband IoT dev kit happens to have some great sensors we can use to get started, and it's also designed for constant, low-power connectivity, which is what I want for this particular product. Cellular connectivity also means we don't have to do any setup or fight with our Wi-Fi routers.

    The downside to Twilio Narrowband is that it only works in the US. If you're hoping to monitor your bread from outside the …

    Read More
  • By Christine Sunu
    Sourd.io is a Fitness Tracker for your Sourdough Starter sourdio-social-bread-data-tracker

    Your new hobby, now with more data

    A sourdough starter monitor with a cute face next to a bowl and a small cup of flour

    Making bread is suddenly popular, and so are my stupid-until-recently bread hacks.

    For years, I have designed ridiculous ways to monitor my sourdough starters. Now, for the first time ever, people are interested in my solutions.

    Tweet from Olga Khazan: Please, God, someone do a sport so my boyfriend will stop talking about his sourdough starter

    Enter the IoT Sourdough Starter Monitor, which monitors your bread’s temperature, humidity, and rise, so you know how it’s growing and when it needs to be fed. Let’s call it… sourd.io

    A sourdough starter monitor with a cute face next to a bowl and a small cup of flour

    A babysitter for my sourdough starter, Brad the Bread.

    Sourd.io screws onto the top of a ball jar for versatility and millennial comfort vibes. You can also balance it on two skewers to judge the rise of bread in a bowl, outside your jar.

    The underside of the sourd.io sourdough starter monitor, which has a temperature/humidity sensor and an ultrasonic distance sensor

    Sourd.i …

    Read More
  • Newer
    Older
    Sign up and start building
    Not ready yet? Talk to an expert.