Comments on: Send SMS with the ESP32 (Twilio)

By: Mike

Mike — Fri, 25 Jul 2025 11:48:38 +0000

In reply to haripreeta. I get the same error. Can't figure it out

By: Sara Santos

Sara Santos — Tue, 25 Mar 2025 10:42:46 +0000

In reply to yuvaraj.

Hi.
Can you be more specific about the error?
Regards,
Sara

By: yuvaraj

yuvaraj — Tue, 25 Mar 2025 05:03:17 +0000

i am getting various errors like in header files , and in wifi
can anyone please help me regarding this

By: haripreeta

haripreeta — Fri, 26 Apr 2024 06:55:20 +0000

d:\Documents\Arduino\libraries\twilio-esp32-client\src\twilio.cpp: In member function ‘bool Twilio::send_message(const String&, const String&, const String&, String&, const String&)’:
d:\Documents\Arduino\libraries\twilio-esp32-client\src\twilio.cpp:41:10: error: ‘class BearSSL::WiFiClientSecure’ has no member named ‘setCACert’
41 | client.setCACert(ca_crt);
| ^~~~~~~~~
d:\Documents\Arduino\libraries\twilio-esp32-client\src\twilio.cpp: In static member function ‘static String Twilio::_get_auth_header(const String&, const String&)’:
d:\Documents\Arduino\libraries\twilio-esp32-client\src\twilio.cpp:119:16: error: incomplete type ‘std::string’ {aka ‘std::__cxx11::basic_string’} used in nested name specifier
119 | std::string::size_type i = 0;
| ^~~~~~~~~
d:\Documents\Arduino\libraries\twilio-esp32-client\src\twilio.cpp:122:10: error: ‘i’ was not declared in this scope
122 | while (i < encoded_string.length()) {
| ^

this is the error i am currently facing…i downloaded the library from your github link, but still there is problem with library..kindly help me with it

By: Reid

Reid — Mon, 22 Apr 2024 16:27:44 +0000

In reply to Paul. Could you provide updated code for this? I am still getting connection errors

By: Paul

Paul — Wed, 20 Mar 2024 20:00:59 +0000

Thanks for the heads up on the certificate update. I had to manually copy the digicert.cpp file into my IDE library file but it worked thanks again.

By: Sara Santos

Sara Santos — Thu, 04 Jan 2024 21:22:47 +0000

In reply to Jim Allison.

Hi.
Thanks for sharing that info.
That’s something new to take a look at.
Regards,
Sara

By: Jim Allison

Jim Allison — Thu, 04 Jan 2024 15:48:42 +0000

In reply to Sara Santos. Hi Sara, Yes, Twilio changed their certificate on December 10th. As a result, the old certificate that was part of the twilio-esp32-client library no longer worked. Adam Demuri updated the library with a new certificate on December 3rd. So, once I compiled my code with this updated certificate, everything worked again. Yaay! Twilio warns against 'pinning' certificates in our microcontroller code and urges us to implement an automatic certificate update process, but that's not something I know how to do. Consequently, I will have to see if my IOT devices are still working in December 2024 when Twilio updates their certificate.

By: Sara Santos

Sara Santos — Mon, 18 Dec 2023 10:58:47 +0000

In reply to Jim Allison.

Hi.
Maybe it’s better to contact their support to see if they made any changes on the API or something.
Regards,
Sara

By: Jim Allison

Jim Allison — Sat, 16 Dec 2023 22:36:12 +0000

In reply to Jacques Laplante. I'm having the same issue... Connection failed! Suddenly, all my ESP32 IOT devices have stopped connecting with Twilio. I've had stable Twilio connections for many months so this is very strange.