diff --git a/CHANGELOG.md b/CHANGELOG.md
index 42bbd9aa..7f409175 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+# 9.2.2
+
+ * Fix firmware locking error ("Can't perform X in Y state")
+ * Removal of dead code / legacy plus numerous unit test additions.
+ * Added coveralls test coverage reporter
+ * Unit test additions (+2.7% coverage :tada:)
+ * Updates to build instructions for third party developers
+ * Bug fix for criteria-based groups that have only one filter criteria.
+
 # 9.2.1
 
  * Improve firmware debug messages.
diff --git a/VERSION b/VERSION
index fcecff17..9c0e1ab9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-9.2.2-rc7
+9.2.2-rc8
diff --git a/farmbot_core/lib/farmbot_core/asset/criteria_retriever.ex b/farmbot_core/lib/farmbot_core/asset/criteria_retriever.ex
index 5ea93963..2afc6348 100644
--- a/farmbot_core/lib/farmbot_core/asset/criteria_retriever.ex
+++ b/farmbot_core/lib/farmbot_core/asset/criteria_retriever.ex
@@ -49,7 +49,7 @@ defmodule FarmbotCore.Asset.CriteriaRetriever do
     needs_meta_filter = Repo.all(dynamic_query)
     # There we go. We have all the matching %Point{}s
     search_matches = search_meta_fields(pg, needs_meta_filter)
-    # ...but there are duplicates. We can remove them via uniq_by: 
+    # ...but there are duplicates. We can remove them via uniq_by:
     Enum.uniq_by((search_matches ++ always_ok), fn p -> p.id end)
   end
 
@@ -136,10 +136,10 @@ defmodule FarmbotCore.Asset.CriteriaRetriever do
     if days == 0 do
       { pg, accum }
     else
-  
+
       op = day_criteria["op"] || "<"
       time = Timex.shift(Timex.now(), days: -1 * days)
-  
+
       { pg, accum ++ [{"created_at", op, time}] }
     end
   end
@@ -159,14 +159,19 @@ defmodule FarmbotCore.Asset.CriteriaRetriever do
   # NOT OK: Repo.query("SELECT foo WHERE bar IN $0", [[1, 2, 3]])
   # OK:     Repo.query("SELECT foo WHERE bar IN ($0, $1, $2)", [1, 2, 3])
   defp stage_3({sql, args}, {full_query, full_args, count0}) when is_list(args) do
-    final = count0 + Enum.count(args) - 1
+    arg_count = Enum.count(args)
+    final = count0 + (arg_count - 1)
     initial_state = {sql, count0}
-    {next_sql, _} = Enum.reduce(args, initial_state, fn
-      (_, {sql, ^count0}) -> {sql <> " ($#{count0},", count0+1}
-      (_, {sql, ^final}) -> {sql <> " $#{final})", final}
-      (_, {sql, count}) -> {sql <> " $#{count},", count+1}
-    end)
-
+    {next_sql, _} =
+      if arg_count == 1 do
+        {sql <> " ($#{count0})", nil}
+      else
+        Enum.reduce(args, initial_state, fn
+          (_, {sql, ^count0}) -> {sql <> " ($#{count0},", count0+1}
+          (_, {sql, ^final}) -> {sql <> " $#{final})", final}
+          (_, {sql, count}) -> {sql <> " $#{count},", count+1}
+        end)
+      end
     {full_query ++ [next_sql], full_args ++ [args], final + 1}
   end
 
diff --git a/farmbot_core/test/asset/criteria_retriever_test.exs b/farmbot_core/test/asset/criteria_retriever_test.exs
index 1c845f1b..404c8d2e 100644
--- a/farmbot_core/test/asset/criteria_retriever_test.exs
+++ b/farmbot_core/test/asset/criteria_retriever_test.exs
@@ -24,6 +24,23 @@ defmodule FarmbotCore.Asset.CriteriaRetrieverTest do
     }
   }
 
+  @simple_point_group %PointGroup{
+    point_ids: [],
+    sort_type: "xy_ascending",
+    criteria: %{
+      "day" => %{
+        "op" => "<",
+        "days_ago" => 0
+      },
+      "string_eq" => %{
+        "pointer_type" => ["Plant"]
+      },
+      "number_eq" => %{},
+      "number_lt" => %{},
+      "number_gt" => %{}
+    }
+  }
+
   # Use this is a fake "Timex.now()" value when mocking.
   @now ~U[2222-12-10 02:22:22.222222Z]
   @five_days_ago ~U[2222-12-05 01:11:11.111111Z]
@@ -90,6 +107,19 @@ defmodule FarmbotCore.Asset.CriteriaRetrieverTest do
     pg
   end
 
+  test "direct match on `pointer_type` via `string_eq`" do
+    Repo.delete_all(PointGroup)
+    Repo.delete_all(Point)
+
+    point!(%{id: 1, pointer_type: "Plant"})
+    point!(%{id: 2, pointer_type: "Weed"})
+    point!(%{id: 3, pointer_type: "ToolSlot"})
+    point!(%{id: 4, pointer_type: "GenericPointer"})
+
+    result = CriteriaRetriever.run(@simple_point_group)
+    assert Enum.count(result) == 1
+  end
+
   test "run/1" do
     expect(Timex, :now, fn -> @now end)
     pg = point_group_with_fake_points()
diff --git a/farmbot_core/test/project_test.exs b/farmbot_core/test/project_test.exs
index 0b6bbf70..d94e6d0d 100644
--- a/farmbot_core/test/project_test.exs
+++ b/farmbot_core/test/project_test.exs
@@ -1,6 +1,6 @@
 defmodule FarmbotCore.ProjectTest do
   use ExUnit.Case
-  @opts [cd: Path.join("c_src", "farmbot-arduino-firmware")]
+  # @opts [cd: Path.join("c_src", "farmbot-arduino-firmware")]
 
   test "arduino_commit" do
     actual = FarmbotCore.Project.arduino_commit()
diff --git a/farmbot_os/test/farmbot_os/lua/ext/firmware_test.exs b/farmbot_os/test/farmbot_os/lua/ext/firmware_test.exs
index cb6e0ed7..66fb6812 100644
--- a/farmbot_os/test/farmbot_os/lua/ext/firmware_test.exs
+++ b/farmbot_os/test/farmbot_os/lua/ext/firmware_test.exs
@@ -22,14 +22,14 @@ defmodule FarmbotOS.Lua.Ext.FirmwareTest do
     lua = "return"
 
     expect(FarmbotCeleryScript.SysCalls, :move_absolute, 4, fn
-      (1, _, _, _) -> :ok
-      (_, _, _, _) -> {:error, msg}
+      1, _, _, _ -> :ok
+      _, _, _, _ -> {:error, msg}
     end)
 
-    assert {[true], ^lua} = Firmware.move_absolute([1,2,3,4], lua)
-    assert {[nil, ^msg], ^lua} = Firmware.move_absolute([5,6,7,8], lua)
-    assert {[true], ^lua} = Firmware.move_absolute([1,2,3], lua)
-    assert {[nil, ^msg], ^lua} = Firmware.move_absolute([5,6,7], lua)
+    assert {[true], ^lua} = Firmware.move_absolute([1, 2, 3, 4], lua)
+    assert {[nil, ^msg], ^lua} = Firmware.move_absolute([5, 6, 7, 8], lua)
+    assert {[true], ^lua} = Firmware.move_absolute([1, 2, 3], lua)
+    assert {[nil, ^msg], ^lua} = Firmware.move_absolute([5, 6, 7], lua)
   end
 
   test "find_home/2" do