CQRobot ADS1115 4-Channel 16-Bit ADC Converter for Arduino & Raspberry Pi

Nice little module that I used with a raspberry pi. Allows for additional channels to be added. This was great for my needs as I was building a kind if hub of different devices. The mount holes were a good addition additional it helped me make a decent case for everything.

This ADC convertor is really nice addition to an electronic project. I was building a system with a raspberry pi that needed a lot of ADC channels and this item was a perfect addition to it. I could easily mount it into any place with the provided mount holes and it is very easy to connect via the jumper wires. I needed fairly broad spectrum changes, so I wasn’t too worried about the minute level accuracy, and for that this was good enough. They provide several individual wires, but keep in mind that these kind of wires always come lose with vibrations or mechanical movements. So I prefer to use tighter connectors for longer term fixes. Also, this doesn’t really affect the functioning, but it comes very well packaged in a case that you can reuse to store it if using in a temporary project and also the item itself looks really nice with bright colours, which makes it good to use in open setups. Listed Price when I reviewed it: £11.99 (Disclaimer: I received this for free as part of the Amazon Vine program, but the views here are based on my own experiences and not edited or influenced by anyone)

CQRobot ADS1115 4-Channel 16-Bit ADC Converter Module with Programmable Gain/I2C Address/Temperature Measurement, Compatible with Arduino/Raspberry Pi, 3.3V/5V Dual Voltage. The ADS 1115 module comes in a retail package. The module is in a sealed bag inside a plastic case. The case has the module name printed on the top and the case makes for a neat and easily identifiable means of storage. The module is a good quality and is supplied with a cable for quick plug-in between the ADS1115 and a Pi or Arduino, or similar device that has pin connections. Pin-out details are printed on the PCB, however there is no information / instructions accompanying the module. There is a link printed on the inside of the list for the ADS1115 page on CQRobot wiki. There is a lot of useful information on that page. Whilst there are cheaper modules around, they are usually very basic, with no cable, or means of connecting the cable to the board (no pins, no sockets, etc.). This module is ready to use with no soldering etc. required. Pins are provided for inputs 1 - 4. I like the fact that an individual input also has it's own set of pins, making it dead easy to add a sensor.

CQRobot ADS1115 4-Channel 16-Bit ADC Converter Module with Programmable Gain/I2C Address/Temperature ...... I have had ADS1115 modules before and they come on tiny boards, this one is more of a development / test board rather than for permanent projects. It comes in a neat little plastic case with a header cable. On the inside of the lid is a note giving details where the instructions can be found including what to search for. This is very handy as most companies have pages with multiple similar parts, this tells you exactly what part to search for on their site and reveals a Wiki page with lots of information for this exact part. Using an Arduino Uno and the test code provide it was up and running in a matter of minutes. On the board is a thermistor, which is great for testing the board. This can be disabled by removing a jumper. There is also an example code for using with a Raspberry Pi and code for using with CQRobot’s TDS module too. The board is well made, nicely soldered, measures just 44 x 30mm and has grounded mounting holes in each corner. There are headers with a jumper for changing the I2C address and connecting the built-in thermistor and a row of headers for connecting to the 4 analogue inputs, which also include common, VCC and 3.3V connections for each input, everything being clearly marked on the boards silk screen. This is a great development board which is easy to setup and use. Neatly packaged and has a Wiki page dedicated to the board although there are heaps of information online regarding coding for whatever microcontroller you wish to use. Connection is easy and the included I2C wiring is of good quality with silicon coated wiring making them very flexible. It is a little expensive compared to other ADS1115 modules, but this is an ideal platform for experimentation and learning.

I used this with an ESP8266 and I'm sure it will work just as well with an ESP32. The main problems with the ADC on these SoCs is that 1) the accuracy is very limited and 2) timing problems. So this board with its 16bit conversion, compared to the 10bit of the ESP inbuilt function is already a huge boon. But, wait, you get *four* ADC channels via I2C? Luxury! So, for me, I can bring this board into a mediocre ESP8266 and get 4 x 16bit ADC conversion for just a few lines of code. A key benefit for me is that the board supports 3.3V so I could just drop it straight into my sensor circuitry without any extra voltage conversion. For accuracy and portability, it's a fantastic solution.

If you're thinking 'Ah, a 16-bit analogue to digital converter (ADC) - I can start sampling CD-quality sound!' Well, it has the resolution necessary, but it's limited to only 8 to 860 samples a second, which is way, way below the rate to get any audio signal you'd want to listen to. As has become annoyingly common, there's no printed documentation for this, just the URL for the maker's wiki. I couldn't access that at first, but it turned out that my browser was objecting to the way that in 2026, it's an http-only site and doesn't have an TLS certificate. I've only used it with an Arduino: not only are they designed for this sort of hardware control, they're a lot cheaper to replace if you mess something up and manage to damage one. There are instructions for using it with a Raspberry Pi too, but they're not as good. For some reason, as you can see here that the image of the Pi is reversed and the image on the wiki that labels the pins is so low resolution that you can barely read it. A search for the chip at the heart of this, the ADS1115 will find the datasheet which, amongst other things, explains how to use the differential inputs if you need longer cabling to the source of the voltage you're measuring.

The CQRobot ADS1115 4-Channel 16-Bit ADC Converter Module is a fantastic tool for projects that require accurate analog signal readings. It uses the ADS1115 16-bit analog-to-digital converter, which provides much higher precision than the typical 10-bit ADC found on many microcontrollers. The module communicates via I²C, making wiring simple with boards like Arduino, Raspberry Pi, ESP32, or other microcontrollers. It supports four analog input channels (or two differential inputs) and includes a programmable gain amplifier, which allows it to amplify small signals for more precise measurements.

This is a great little board and everything I'd expect from CQRobot equipment. There's a link to comprehensive data sheets and programming guides, so you won't be struggling to get it working. It's fairly easy to wire up too, and allowing for 3.3V or 5V is a real bonus for versatility. Has mounting holes, good quality construction and all the connectors you need to get going. Really good kit in a little plastic box. A hint, when looking at their Wiki, you need to change the address from HTTPS to HTTP, if your browser corrects it to https it won't find the page. Good value and the temperature sensor seems accurate too.

🔂🔢 Lo cogí para ampliar la capacidad de mi Arduino, proporciona 4 ADC de 16 bits, 15 para la medición y un último para el signo. El ADS1115 se conecta por I2C, por lo que es sencillo realizar su lectura. Dispone de 4 direcciones, que se elige mediante la conexión del pin ADDR Puedes obtener una mayor precisión, además de liberar de esta carga al procesador. Tiene dos modos de medición, single ended y diferencial. En el modo single ended disponemos de cuatro canales de 15 bits. En el modo diferencial usamos dos ADC para cada medición, por lo que el número de canales se reduce a 2, pero tendremos la ventaja de poder medir tensiones negativas y mayor inmunidad al ruido. Pequeño para poderlo usar de circuito integrado, aunque los cables un poco cortos 📦 Viene en una caja pequeña de plástico y dentro la placa, trae también un velcro para sujetar el cable. 👍👎 ✔️ Fácil de configurar y conectar. ✔️ Muy buena adherencia a la cama, me cuesta despegarlo más que otros hilos. ❌ Un poco lento ❔ Estaría mejor unos cables más largos, siempre se pueden cortar más adelante

Unboxing : Le module ADC arrive emballé dans un sachet plastique antistatique, rangé dans une petite boite en plastique moulé Le module est constitué d'un PCB qualitatif, et bien réalisé, avec des composants bien montés, et d'une nappe permettant la connexion vers l'appareil en I2C (Raspberry, ESP, Arduino, ...) On retrouve deux cavaliers permettant de configurer l'adresse I2C du module (4 adresses différentes = 4 modules possibles sur le même bus), ou de configurer le mode de fonctionnement Le fonctionnement est simple, la mise en œuvre est facile (on trouve de nombreux tutoriels sur le net

UNBOXING 📦 Il modulo arriva all’interno di una piccola scatola di plastica rigida trasparente, con la scheda inserita in una bustina antistatica per evitare possibili danni dovuti all’elettricità statica. La confezione include la schedina ADC basata su chip ADS1115 e un cavetto di collegamento a 4 poli per l’alimentazione ed il bus I2C. Il PCB appare compatto e ben organizzato: le serigrafie dei pin sono chiare e leggibili e rendono immediata l’identificazione delle connessioni. Le saldature appaiono pulite e i componenti ben posizionati,. USO ☕ Questo modulo è pensato per aggiungere una conversione analogico-digitale più precisa a schede come Arduino, Raspberry Pi o altri microcontrollori. Utilizza il chip ADS1115 a 16 bit, che permette di ottenere letture molto più dettagliate rispetto agli ADC integrati in molte schede di sviluppo. Il collegamento avviene tramite interfaccia I2C, quindi bastano pochi fili per integrarlo in un progetto. I quattro ingressi analogici possono essere utilizzati come 4 canali single-ended oppure 2 differenziali, caratteristica utile quando si devono misurare segnali molto piccoli o ridurre il rumore. La frequenza di campionamento è regolabile da 8 a 860 campioni al secondo, quindi si presta bene a misurazioni di precisione e monitoraggio di sensori come temperatura, tensione o pressione. Ho apprezzato anche la compatibilità con alimentazione 3.3V e 5V, che semplifica l’utilizzo con diverse piattaforme senza adattatori di livello esterni. È presente inoltre un termistore NTC che consente di realizzare facilmente una misura di temperatura, sia per semplice test della scheda (cosa che ho fatto e potete vedere nel video) che per aggiungere una compensazione di temperatura su misure con sensori sensibili ad essa. COSA MI È PIACIUTO 👍 • Risoluzione a 16 bit, che migliora sensibilmente la precisione rispetto agli ADC standard dei microcontrollori. • 4 canali analogici configurabili (oppure 2 differenziali), utili per leggere più sensori nello stesso progetto. • Guadagno programmabile (PGA) che permette di adattare la sensibilità del convertitore a segnali di diversa ampiezza. • Compatibilità 3.3V / 5V, molto comoda con Arduino, Raspberry Pi e altre schede di sviluppo. • Indirizzi I2C configurabili, che permettono di collegare più moduli sullo stesso bus. • PCB ben realizzato, con serigrafia chiara e connessioni facili da cablare su breadboard. • Interfaccia per sensore di temperatura NTC integrata, utile in diversi progetti di monitoraggio. COSA NON MI È PIACIUTO 👎 • Non è progettato per acquisizioni ad alta velocità: il limite massimo di 860 SPS lo rende più adatto a segnali lenti piuttosto che a forme d’onda rapide. • Non è un componente “plug and play” per chi è alle prime armi: richiede un minimo di familiarità con microcontrollori e bus I2C. • La documentazione cartacea nella confezione è essenziale e rimanda principalmente alle informazioni online. CONCLUSIONI 📢 Il modulo CQRobot basato su ADS1115 è una soluzione molto utile quando si ha bisogno di misure analogiche più precise rispetto a quelle offerte dagli ADC integrati nelle schede di sviluppo. La combinazione di alta risoluzione, guadagno programmabile, compatibilità con diverse tensioni e indirizzi I2C configurabili lo rende un componente versatile per progetti di sensoristica, acquisizione dati e prototipazione elettronica. Non è pensato per applicazioni ad alta velocità o per chi non ha alcuna esperienza con microcontrollori, ma per chi realizza progetti elettronici rappresenta un ottimo upgrade per migliorare precisione e stabilità delle letture analogiche. Nel complesso è un modulo ben progettato e affidabile, adatto a molti scenari di sviluppo e sperimentazione.

It works !

Zum Einsatz kam es bei mir in einem etwas größeren Bastelprojekt, das man grob als "Controller für alles Mögliche" beschreiben könnte. Darin stecken mehrere ESP32, unter anderem zwei ESP32-C3 und ein ESP32-S3 mit Display, außerdem diverse Hebelschalter, Buttons, LEDs, Potentiometer, Rotary Switches und Encoder. Es geht also genau um dieses Nerd-Spielzeug, wo man schnell merkt, dass die GPIOs und analogen Eingänge eines einzelnen Mikrocontrollers irgendwann nicht mehr reichen. Für einige Potentiometer nutze ich in diesem Projekt auch einen CD4051-Analogmultiplexer. Das funktioniert für viele Anwendungen grundsätzlich gut, braucht bei mir aber deutlich mehr Feintuning in der Software, zum Beispiel in ESPHome über Filter, Delays und Glättung, damit die Werte auch so reagieren, wie ich das möchte für ein direktes, smoothes Gefühl beim Benutzen. Mit diesem ADS1115-Modul war mein Eindruck dagegen, dass die Potis direkter, feiner und insgesamt sauberer ausgewertet werden konnten. Das passt auch zum Zweck des Bausteins: der ADS1115 ist ein externer 16-Bit-ADC und damit genau für präzisere analoge Messungen gedacht. Die Einrichtung war bei mir insgesamt einfach und problemlos. Das Modul wurde direkt erkannt, ließ sich problemlos per I2C einbinden und hat im Betrieb keine erkennbaren Probleme bereitet. Praktisch ist auch, dass das Modul sowohl für 3,3-V- als auch für 5-V-Setups gedacht ist und damit gut zu typischen Arduino-, Raspberry-Pi- und ESP32-Projekten passt. Das spart mir einen Step-Down-Converter. Die vier analogen Eingänge sind natürlich weniger als bei einer Multiplexer-Lösung mit acht Kanälen, dafür bekommt man hier aber eben eine deutlich präzisere und angenehmere Messwerterfassung. Auch die Verarbeitung des Moduls macht einen ordentlichen Eindruck. Die Anschlüsse sind klar beschriftet und die Platine wirkt sauber verarbeitet. Fazit: Für Bastler, die mit ESP32, Arduino oder Raspberry Pi analoge Signale etwas präziser und feiner granuliert als mit den Onboard-ADC erfassen möchten, ist dieses ADS1115-Modul eine echt brauchbare Erweiterung. Besonders bei Potentiometern hat es sich bei mir als angenehmer und präziser erwiesen als meine bisherige Lösung über einen Analogmultiplexer und den internen ADC des ESP32. Für meine Zwecke ist das ein sehr gutes Modul, problemlos in der Nutzung und daher klare 5 Sterne.