diff --git a/.tool-versions b/.tool-versions
index 68bfb342..6489cf3a 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
 erlang 20.0
-elixir 1.5.0
+elixir 1.5.2
diff --git a/config/host/dev.exs b/config/host/dev.exs
index 003eb547..ccbd7e76 100644
--- a/config/host/dev.exs
+++ b/config/host/dev.exs
@@ -49,7 +49,7 @@ config :farmbot, Farmbot.System.ConfigStorage,
 config :farmbot, :behaviour,
   authorization: Farmbot.Bootstrap.Authorization,
   system_tasks: Farmbot.Host.SystemTasks,
-  update_handler: Farmbot.Host.UpdateHandler,
-  firmware_handler: Farmbot.Firmware.UartHandler
+  update_handler: Farmbot.Host.UpdateHandler
+  # firmware_handler: Farmbot.Firmware.UartHandler
 
 config :farmbot, :uart_handler, tty: "/dev/ttyACM0"
diff --git a/lib/farmbot/celery_script/ast/node/execute_script.ex b/lib/farmbot/celery_script/ast/node/execute_script.ex
index f4eff7fb..6def41c6 100644
--- a/lib/farmbot/celery_script/ast/node/execute_script.ex
+++ b/lib/farmbot/celery_script/ast/node/execute_script.ex
@@ -3,18 +3,24 @@ defmodule Farmbot.CeleryScript.AST.Node.ExecuteScript do
   use Farmbot.CeleryScript.AST.Node
   allow_args [:label]
 
-  def execute(%{label: label}, _, env) do
+  def execute(%{label: label}, pairs, env) do
     env = mutate_env(env)
     case Farmbot.Farmware.lookup(label) do
-      {:ok, fw} -> do_execute(fw, env)
+      {:ok, fw} -> do_execute(fw, pairs, env)
       {:error, reason} -> {:error, reason, env}
     end
   end
 
-  defp do_execute(%Farmbot.Farmware{} = fw, env) do
-    case Farmbot.Farmware.execute(fw) do
+  defp do_execute(%Farmbot.Farmware{} = fw, pairs, env) do
+    case Farmbot.Farmware.execute(fw, to_fw_env(pairs)) do
       %Farmbot.Farmware.Runtime{exit_status: 0} -> {:ok, env}
       %Farmbot.Farmware.Runtime{} -> {:error, "Farmware failed", env}
     end
   end
+
+  defp to_fw_env(pairs, acc \\ [])
+  defp to_fw_env([], acc), do: acc
+  defp to_fw_env([%{args: %{label: key, value: value}} | rest], acc) do
+    to_fw_env(rest, [{key, value} | acc])
+  end
 end
diff --git a/lib/farmbot/farmware/farmware.ex b/lib/farmbot/farmware/farmware.ex
index a6949f26..04644429 100644
--- a/lib/farmbot/farmware/farmware.ex
+++ b/lib/farmbot/farmware/farmware.ex
@@ -124,7 +124,7 @@ defmodule Farmbot.Farmware do
     :meta,
   ]
 
-  defdelegate execute(fw), to: Farmbot.Farmware.Runtime
+  defdelegate execute(fw, env), to: Farmbot.Farmware.Runtime
 
   @doc "Lookup a farmware by it's name."
   def lookup(name) do
diff --git a/lib/farmbot/farmware/runtime.ex b/lib/farmbot/farmware/runtime.ex
index 0fb9ddec..be98baa5 100644
--- a/lib/farmbot/farmware/runtime.ex
+++ b/lib/farmbot/farmware/runtime.ex
@@ -10,12 +10,12 @@ defmodule Farmbot.Farmware.Runtime do
   defstruct [:farmware, :env, :port, :exit_status, :working_dir, :return_dir]
 
   @doc "Execute a Farmware struct."
-  def execute(%Farmware{} = farmware) do
+  def execute(%Farmware{} = farmware, env) when is_list(env) do
     Logger.busy(2, "Beginning execution of #{inspect(farmware)}")
     fw_path = Installer.install_path(farmware) |> Path.absname("#{:code.priv_dir(:farmbot)}/..")
     cwd = File.cwd!()
     with :ok <- File.cd(fw_path),
-         env <- build_env(farmware) do
+         env <- build_env(farmware, env) do
       exec = farmware.executable
 
       opts = [
@@ -75,7 +75,7 @@ defmodule Farmbot.Farmware.Runtime do
     end
   end
 
-  defp build_env(%Farmware{config: config, name: fw_name} = _farmware) do
+  def build_env(%Farmware{config: config, name: fw_name} = _farmware, env) do
     token = Farmbot.System.ConfigStorage.get_config_value(:string, "authorization", "token")
     images_dir = "/tmp/images"
 
@@ -88,6 +88,7 @@ defmodule Farmbot.Farmware.Runtime do
     |> Map.put("FARMWARE_URL", "http://localhost:27347/")
     |> Map.put("FARMBOT_OS_VERSION", @fbos_version)
     |> Map.merge(Farmbot.BotState.get_user_env())
+    |> Map.merge(Map.new(env))
     |> Enum.map(fn {key, val} -> {to_erl_safe(key), to_erl_safe(val)} end)
   end
 
diff --git a/lib/farmbot/firmware/uart_handler/uart_handler.ex b/lib/farmbot/firmware/uart_handler/uart_handler.ex
index 47c2926b..8a9583ff 100644
--- a/lib/farmbot/firmware/uart_handler/uart_handler.ex
+++ b/lib/farmbot/firmware/uart_handler/uart_handler.ex
@@ -105,7 +105,7 @@ defmodule Farmbot.Firmware.UartHandler do
     {:noreply, [], state}
   end
 
-  defp handle_config({:config, "settings", key, val}, state)
+  defp handle_config({:config, "settings", key, _val}, state)
     when key in ["firmware_input_log", "firmware_output_log"]
   do
     # Restart the framing to pick up new changes.