diff --git a/CHANGELOG.md b/CHANGELOG.md
index f2bf5df..f35a322 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+### Added
+* Ability to set heat setpoint.
+
 ## v1.2.1 - 2019-03-26
 ### Fixed
 * Messages larger than 1024 bytes are now handled properly.
diff --git a/README.md b/README.md
index 3238334..c4c3c4c 100755
--- a/README.md
+++ b/README.md
@@ -192,6 +192,10 @@ Requests controller configuration from the connected unit. Emits the `controller
 
 Activates or deactivates a circuit. See [`SLSetCircuitStateMessage`](#slsetcircuitstatemessage) documentation for argument values. Emits the `circuitStateChanged` event when response is acknowledged.
 
+### setSetPoint(controllerId, bodyType, temperature)
+
+Sets the heating setpoint for any body. See [`SLSetHeatSetPointMessage`](#slsetheatsetpointmessage) documentation for argument values. Emits the `setPointChanged` event when response is acknowledged.
+
 ### Events
 
 * `loggedIn` - Indicates that a connection to the server has been established and the login process completed. `get` methods can be called once this event has been emitted.
@@ -201,6 +205,7 @@ Activates or deactivates a circuit. See [`SLSetCircuitStateMessage`](#slsetcircu
 * `saltCellConfig` - Indicates that a response to `getSaltCellConfig()` has been received. Event handler receives a [`SLSaltCellConfigMessage`](#slsaltcellconfigmessage) object.
 * `controllerConfig` - Indicates that a response to `getControllerConfig()` has been received. Event handler receives a [`SLControllerConfigMessage`](#slcontrollerconfigmessage) object.
 * `circuitStateChanged` - Indicates that a response to `setCircuitState()` has been received. Event handler receives a [`SLSetCircuitStateMessage`](#slsetcircuitstatemessage) object.
+* `setPointChanged` - Indicates that a response to `setSetPoint()` has been received. Event handler receives a [`SLSetHeatSetPointMessage`](#slsetheatsetpointmessage) object.
 
 ### Properties
 
@@ -355,6 +360,17 @@ Passed as an argument to the emitted `circuitStateChanged` event. The passed ver
   * This ID can be retrieved from `SLControllerConfigMessage`'s `bodyArray` property.
 * `circuitState` - integer indicating whether to switch the circuit on (`1`) or off (`0`).
 
+## SLSetHeatSetPointMessage
+
+Passed as an argument to the emitted `setPointChanged` event. The passed version is empty, however, since the response is just an acknowledgement of receipt of the set command.
+
+### Properties
+
+* `controllerId` - integer indicating the ID of the controller to send this command to.
+  * Note that while `SLControllerConfigMessage` includes a controllerId, this ID, in my experience, should always be 0.
+* `bodyType` - integer indicating the type of body to set the setpoint of. The pool is body `0` and the spa is body `1`.
+* `temperature` - integer indicating the desired setpoint. This is presumably in whatever units your system is set to (celsius or fahrenheit).
+
 ## SLGetGatewayDataMessage
 
 Passed as an argument to the emitted `gatewayFound` event. Contains information about the remote unit's status and access properties.
diff --git a/index.js b/index.js
index 60850e8..512594f 100644
--- a/index.js
+++ b/index.js
@@ -206,6 +206,10 @@ class UnitConnection extends EventEmitter {
     this.client.write(new messages.SLSetCircuitStateMessage(controllerId, circuitId, circuitState).toBuffer());
   }
 
+  setSetPoint(controllerId, bodyType, temperature) {
+    this.client.write(new messages.SLSetHeatSetPointMessage(controllerId, bodyType, temperature).toBuffer());
+  }
+
   onClientMessage(msg) {
     // console.log('received message of length ' + msg.length);
     if (msg.length < 4) {
@@ -247,6 +251,10 @@ class UnitConnection extends EventEmitter {
         // console.log("  it's circuit toggle ack");
         this.emit('circuitStateChanged', new messages.SLSetCircuitStateMessage());
         break;
+      case messages.SLSetHeatSetPointMessage.getResponseId():
+        // console.log("  it's a setpoint ack");
+        this.emit('setPointChanged', new messages.SLSetHeatSetPointMessage());
+        break;
       case 13:
         // console.log("  it's a login failure.");
         this.emit('loginFailed');
diff --git a/messages/SLSetHeatSetPoint.js b/messages/SLSetHeatSetPoint.js
new file mode 100644
index 0000000..0d5bb54
--- /dev/null
+++ b/messages/SLSetHeatSetPoint.js
@@ -0,0 +1,27 @@
+'use strict';
+
+const SLMessage = require('./SLMessage.js').SLMessage;
+
+const MSG_ID = 12528;
+
+exports.SLSetHeatSetPoint = class SLSetHeatSetPoint extends SLMessage {
+  constructor(controllerIndex, bodyType, temperature) {
+    super(0, MSG_ID);
+
+    this.controllerIndex = controllerIndex;
+    this.bodyType = bodyType;
+    this.temperature = temperature;
+  }
+
+  encode() {
+    this.writeInt32LE(this.controllerIndex || 0);
+    this.writeInt32LE(this.bodyType || 0);
+    this.writeInt32LE(this.temperature || 0);
+
+    super.encode();
+  }
+
+  static getResponseId() {
+    return MSG_ID + 1;
+  }
+};
diff --git a/messages/index.js b/messages/index.js
index a283e6d..e3b18c0 100644
--- a/messages/index.js
+++ b/messages/index.js
@@ -9,3 +9,4 @@ exports.SLSaltCellConfigMessage = require('./SLSaltCellConfigMessage.js').SLSalt
 exports.SLVersionMessage = require('./SLVersionMessage.js').SLVersionMessage;
 exports.SLSetCircuitStateMessage = require('./SLSetCircuitStateMessage.js').SLSetCircuitStateMessage;
 exports.SLGetGatewayDataMessage = require('./SLGetGatewayDataMessage.js').SLGetGatewayDataMessage;
+exports.SLSetHeatSetPointMessage = require('./SLSetHeatSetPoint.js').SLSetHeatSetPoint;